__init__.py

            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=1.0, precision=3)
            
    diffuse_ramp_input: EnumProperty(
            name="Input",
            description="How the ramp maps on the surface",   
            items=(("SHADER", "Shader", ""),
                   ("ENERGY", "Energy", ""),
                   ("NORMAL", "Normal", ""),
                   ("RESULT", "Result", "")),
            default="SHADER")
            
    diffuse_shader: EnumProperty(
            name="Diffuse Shader Model",
            description="How the ramp maps on the surface",   
            items=(("LAMBERT", "Lambert", "Use a Lambertian shader"),
                   ("OREN_NAYAR", "Oren-Nayar", "Use an Oren-Nayar shader"),
                   ("MINNAERT", "Minnaert", "Use a Minnaert shader"),
                   ("FRESNEL", "Fresnel", "Use a Fresnel shader")),
            default="LAMBERT")

    diffuse_toon_size: FloatProperty(
            name="Size",
            description="Size of diffuse toon area",
            min=0.0, max=3.14, soft_min=0.0, soft_max=3.14, default=0.5, precision=3)
            
    diffuse_toon_smooth: FloatProperty(
            name="Smooth",
            description="Smoothness of diffuse toon area",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=0.1, precision=3)

    emit: FloatProperty(
            name="Emit",
            description="Amount of light to emit",
            min=0.0, soft_min=0.0, #max=inf, soft_max=inf,
            default=0.0, precision=3)

    mirror_color: FloatVectorProperty(
            name="Mirror color",
            description=("Mirror color of the material"),
            precision=4, step=0.01, min=0, #max=inf, soft_max=1,
            default=(0.6,0.6,0.6), options={'ANIMATABLE'}, subtype='COLOR')
            
    roughness: FloatProperty(
            name="Roughness",
            description="Oren-Nayar Roughness",
            min=0.0, max=3.14, soft_min=0.0, soft_max=3.14, default=0.5, precision=3)

    halo: BoolProperty(
            name="Halo", description=" Halo settings for the material",
            default=False)
            #(was readonly in Blender2.79, never None)
            
    line_color: FloatVectorProperty(
            name="Line color",
            description=("Line color used for Freestyle line rendering"),
            precision=4, step=0.01, min=0, #max=inf, soft_max=1,
            default=(0.0,0.0,0.0), options={'ANIMATABLE'}, subtype='COLOR')

    #diffuse_ramp:
    ##Color ramp used to affect diffuse shading
            ##Type:	ColorRamp, (readonly)    
    
            #cr_node = bpy.data.materials['Material'].node_tree.nodes['ColorRamp']
            #layout.template_color_ramp(cr_node, "color_ramp", expand=True)
            
            #ou
            
            #class bpy.types.ColorRamp(bpy_struct)            

    line_priority: IntProperty(
            name="Recursion Limit",
            description="The line color of a higher priority is used at material boundaries",
            min=0, max=32767, default=0)
            
    specular_color: FloatVectorProperty(
            name="Specular color",
            description=("Specular color of the material "),
            precision=4, step=0.01, min=0, #max=inf, soft_max=1,
            default=(1.0,1.0,1.0), options={'ANIMATABLE'}, subtype='COLOR')

    specular_hardness: IntProperty(
            name="Hardness",
            description="How hard (sharp) the specular reflection is",
            min=1, max=511, default=50)
            
    specular_intensity: FloatProperty(
            name="Intensity",
            description="How intense (bright) the specular reflection is",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=0.5, precision=3)

    specular_ior: FloatProperty(
            name="IOR",
            description="Specular index of refraction",
            min=-10.0, max=10.0, soft_min=0.0, soft_max=10.0, default=1.0, precision=3)
            
    ior: FloatProperty(
            name="IOR",
            description="Index of refraction",
            min=-10.0, max=10.0, soft_min=0.0, soft_max=10.0, default=1.0, precision=3)   

    specular_shader: EnumProperty(
            name="Specular Shader Model",
            description="How the ramp maps on the surface",   
            items=(("COOKTORR", "CookTorr", "Use a Cook-Torrance shader"),
                   ("PHONG", "Phong", "Use a Phong shader"),
                   ("BLINN", "Blinn", "Use a Blinn shader"),
                   ("TOON", "Toon", "Use a Toon shader"),
                   ("WARDISO", "WardIso", "Use a Ward anisotropic shader")),
            default="COOKTORR")           

    specular_slope: FloatProperty(
            name="Slope",
            description="The standard deviation of surface slope",
            min=0.0, max=0.4, soft_min=0.0, soft_max=0.4, default=0.1, precision=3)

    specular_toon_size: FloatProperty(
            name="Size",
            description="Size of specular toon area",
            min=0.0, max=0.53, soft_min=0.0, soft_max=0.53, default=0.5, precision=3)

    specular_toon_smooth: FloatProperty(
            name="Smooth",
            description="Smoothness of specular toon area",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=0.1, precision=3)
            
            
    translucency: FloatProperty(
            name="Translucency",
            description="Amount of diffuse shading on the back side",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=0.0, precision=3)
            
    transparency_method: EnumProperty(
            name="Specular Shader Model",
            description="Method to use for rendering transparency",   
            items=(("MASK", "Mask", "Mask the background"),
                   ("Z_TRANSPARENCY", "Z Transparency", "Use alpha buffer for transparent faces"),#TO DEPRECATE
                   ("RAYTRACE", "Raytrace", "Use raytracing for transparent refraction rendering")),
            default="MASK")
            
    type: EnumProperty(
            name="Type",
            description="Material type defining how the object is rendered",   
            items=(("SURFACE", "Surface", "Render object as a surface"),
                   ("WIRE", "Wire", "Render the edges of faces as wires (not supported in raytracing)"),#TO UPDATE > USE MACRO AND CHNGE DESCRIPTION
                   ("VOLUME", "Volume", "Render object as a volume"),
                   ("‘HALO’", "Halo", "Render object as halo particles")), #TO UPDATE > USE MACRO AND CHNGE DESCRIPTION
            default="SURFACE")
            
    use_cast_shadows: BoolProperty(
            name="Cast", description="Allow this material to cast shadows",
            default=True)
            
    use_cast_shadows_only: BoolProperty(
            name="Cast Only", description="Make objects with this material "
                                          "appear invisible (not rendered), only "
                                          "casting shadows",
            default=False)
            
    use_cubic: BoolProperty(
            name="Cubic Interpolation", description="Use cubic interpolation for diffuse "
                                                    "values, for smoother transitions",
            default=False)

    use_diffuse_ramp: BoolProperty(
            name="Ramp", description="Toggle diffuse ramp operations",
            default=False)
            
    use_light_group_exclusive: BoolProperty(
            name="Exclusive", description="Material uses the light group exclusively"
                                          "- these lamps are excluded from other "
                                          "scene lighting",
            default=False)
            
    use_light_group_local: BoolProperty(
            name="Local", description="When linked in, material uses local light"
                                      " group with the same name",
            default=False)
            
    use_mist: BoolProperty(
            name="Use Mist", description="Use mist with this material "
                                      "(in world settings)",
            default=True)
            
    use_nodes: BoolProperty(
            name="Nodes", description="Use shader nodes to render the material",#Add Icon in UI or here? icon='NODES'
            default=False)
            
    use_object_color: BoolProperty(
            name="Object Color", description="Modulate the result with a per-object color",
            default=False)
            
    use_only_shadow: BoolProperty(
            name="Shadows Only", description="Render shadows as the material’s alpha "
                                             "value, making the material transparent "
                                             "except for shadowed areas",
            default=False)
            
    use_shadeless: BoolProperty(
            name="Shadeless", description="Make this material insensitive to "
                                          "light or shadow",
            default=False)
            
    use_shadows: BoolProperty(
            name="Receive", description="Allow this material to receive shadows",
            default=True)

    use_sky: BoolProperty(
            name="Sky", description="Render this material with zero alpha, "
                                        "with sky background in place (scanline only)",
            default=False)
            
    use_specular_ramp: BoolProperty(
            name="Ramp", description="Toggle specular ramp operations",
            default=False)
            
    use_tangent_shading: BoolProperty(
            name="Tangent Shading", description="Use the material’s tangent vector instead"
                                     "of the normal for shading - for "
                                     "anisotropic shading effects",
            default=False)
            
    use_transparent_shadows: BoolProperty(
            name="Receive Transparent", description="Allow this object to receive transparent "
                                                    "shadows cast through other object",
            default=False) #linked to fake caustics
            
    use_vertex_color_light: BoolProperty(
            name="Vertex Color Light", description="Add vertex colors as additional lighting",
            default=False)
            
    use_vertex_color_paint: BoolProperty(
            name="Vertex Color Paint", description="Replace object base color with vertex "
                                                   "colors (multiply with ‘texture face’ "
                                                   "face assigned textures)",
            default=False)

    
    specular_ramp_blend: EnumProperty(
            name="Specular ramp blend",
            description="Blending method of the ramp and the specular color",   
            items=(("MIX", "Mix", ""),
                   ("ADD", "Add", ""),
                   ("MULTIPLY", "Multiply", ""),
                   ("SUBTRACT", "Subtract", ""),
                   ("SCREEN", "Screen", ""),
                   ("DIVIDE", "Divide", ""),
                   ("DIFFERENCE", "Difference", ""),
                   ("DARKEN", "Darken", ""),
                   ("LIGHTEN", "Lighten", ""),
                   ("OVERLAY", "Overlay", ""),
                   ("DODGE", "Dodge", ""),
                   ("BURN", "Burn", ""),
                   ("HUE", "Hue", ""),
                   ("SATURATION", "Saturation", ""),
                   ("VALUE", "Value", ""),
                   ("COLOR", "Color", ""),
                   ("SOFT_LIGHT", "Soft light", ""),
                   ("LINEAR_LIGHT", "Linear light", "")),
            default="MIX")

    specular_ramp_factor: FloatProperty(
            name="Factor",
            description="Blending factor (also uses alpha in Colorband)",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=1.0, precision=3)
            
    specular_ramp_input: EnumProperty(
            name="Input",
            description="How the ramp maps on the surface",   
            items=(("SHADER", "Shader", ""),
                   ("ENERGY", "Energy", ""),
                   ("NORMAL", "Normal", ""),
                   ("RESULT", "Result", "")),
            default="SHADER")            


    irid_enable: BoolProperty(
            name="Iridescence coating",
            description="Newton's thin film interference (like an oil slick on a puddle of "
                        "water or the rainbow hues of a soap bubble.)",
            default=False)

    mirror_use_IOR: BoolProperty(
            name="Correct Reflection",
            description="Use same IOR as raytrace transparency to calculate mirror reflections. "
                        "More physically correct",
            default=False)

    mirror_metallic: BoolProperty(
            name="Metallic Reflection",
            description="mirror reflections get colored as diffuse (for metallic materials)",
            default=False)

    conserve_energy: BoolProperty(
            name="Conserve Energy",
            description="Light transmitted is more correctly reduced by mirror reflections, "
                        "also the sum of diffuse and translucency gets reduced below one ",
            default=True)

    irid_amount: FloatProperty(
            name="amount",
            description="Contribution of the iridescence effect to the overall surface color. "
                        "As a rule of thumb keep to around 0.25 (25% contribution) or less, "
                        "but experiment. If the surface is coming out too white, try lowering "
                        "the diffuse and possibly the ambient values of the surface",
            min=0.0, max=1.0, soft_min=0.01, soft_max=1.0, default=0.25)

    irid_thickness: FloatProperty(
            name="thickness",
            description="A very thin film will have a high frequency of color changes while a "
                        "thick film will have large areas of color",
            min=0.0, max=1000.0, soft_min=0.1, soft_max=10.0, default=1)

    irid_turbulence: FloatProperty(
            name="turbulence", description="This parameter varies the thickness",
            min=0.0, max=10.0, soft_min=0.000, soft_max=1.0, default=0)

    interior_fade_color: FloatVectorProperty(
            name="Interior Fade Color", description="Color of filtered attenuation for transparent "
                                           "materials",
            precision=4, step=0.01, min=0.0, soft_max=1.0,
            default=(0, 0, 0), options={'ANIMATABLE'}, subtype='COLOR')

    caustics_enable: BoolProperty(
            name="Caustics",
            description="use only fake refractive caustics (default) or photon based "
                        "reflective/refractive caustics",
            default=True)

    fake_caustics: BoolProperty(
            name="Fake Caustics", description="use only (Fast) fake refractive caustics",
            default=True)

    fake_caustics_power: FloatProperty(
            name="Fake caustics power",
            description="Values typically range from 0.0 to 1.0 or higher. Zero is no caustics. "
                        "Low, non-zero values give broad hot-spots while higher values give "
                        "tighter, smaller simulated focal points",
            min=0.00, max=10.0, soft_min=0.00, soft_max=5.0, default=0.07)

    refraction_caustics: BoolProperty(
            name="Refractive Caustics", description="hotspots of light focused when going through the material",
            default=True)

    photons_dispersion: FloatProperty(
            name="Chromatic Dispersion",
            description="Light passing through will be separated according to wavelength. "
                        "This ratio of refractive indices for violet to red controls how much "
                        "the colors are spread out 1 = no dispersion, good values are 1.01 to 1.1",
            min=1.0000, max=10.000, soft_min=1.0000, soft_max=1.1000, precision=4, default=1.0000)

    photons_dispersion_samples: IntProperty(
            name="Dispersion Samples", description="Number of color-steps for dispersion",
            min=2, max=128, default=7)

    photons_reflection: BoolProperty(
            name="Reflective Photon Caustics",
            description="Use this to make your Sauron's ring ;-P",
            default=False)

    refraction_type: EnumProperty(
            items=[
                   ("1", "Fake Caustics", "use fake caustics"),
                   ("2", "Photons Caustics", "use photons for refractive caustics")],
            name="Refraction Type:",
            description="use fake caustics (fast) or true photons for refractive Caustics",
            default="1")

    ##################################CustomPOV Code############################
    replacement_text: StringProperty(
            name="Declared name:",
            description="Type the declared name in custom POV code or an external "
                        ".inc it points at. texture {} expected",
            default="")



            # NODES

    def use_material_nodes_callback(self, context):
        if hasattr(context.space_data, "tree_type"):
            context.space_data.tree_type = 'ObjectNodeTree'
        mat=context.object.active_material
        if mat.pov.material_use_nodes:
            mat.use_nodes=True
            tree = mat.node_tree
            tree.name=mat.name
            links = tree.links
            default = True
            if len(tree.nodes) == 2:
                o = 0
                m = 0
                for node in tree.nodes:
                    if node.type in {"OUTPUT","MATERIAL"}:
                        tree.nodes.remove(node)
                        default = True
                for node in tree.nodes:
                    if node.bl_idname == 'PovrayOutputNode':
                        o+=1
                    if node.bl_idname == 'PovrayTextureNode':
                        m+=1
                if o == 1 and m == 1:
                    default = False
            elif len(tree.nodes) == 0:
                default = True
            else:
                default = False
            if default:
                output = tree.nodes.new('PovrayOutputNode')
                output.location = 200,200
                tmap = tree.nodes.new('PovrayTextureNode')
                tmap.location = 0,200
                links.new(tmap.outputs[0],output.inputs[0])
                tmap.select = True
                tree.nodes.active = tmap
        else:
            mat.use_nodes=False


    def use_texture_nodes_callback(self, context):
        tex=context.object.active_material.active_texture
        if tex.pov.texture_use_nodes:
            tex.use_nodes=True
            if len(tex.node_tree.nodes)==2:
                for node in tex.node_tree.nodes:
                    if node.type in {"OUTPUT","CHECKER"}:
                        tex.node_tree.nodes.remove(node)
        else:
            tex.use_nodes=False

    def node_active_callback(self, context):
        items = []
        mat=context.material
        mat.node_tree.nodes
        for node in mat.node_tree.nodes:
            node.select=False
        for node in mat.node_tree.nodes:
            if node.name==mat.pov.material_active_node:
                node.select=True
                mat.node_tree.nodes.active=node

                return node

    def node_enum_callback(self, context):
        items = []
        mat=context.material
        nodes=mat.node_tree.nodes
        for node in nodes:
            items.append(("%s"%node.name,"%s"%node.name,""))
        return items

    def pigment_normal_callback(self, context):
        render = context.scene.pov.render
        items = [("pigment", "Pigment", ""),("normal", "Normal", "")]
        if render == 'hgpovray':
            items = [("pigment", "Pigment", ""),("normal", "Normal", ""),("modulation", "Modulation", "")]
        return items

    def glow_callback(self, context):
        scene = context.scene
        ob = context.object
        ob.pov.mesh_write_as_old = ob.pov.mesh_write_as
        if scene.pov.render == 'uberpov' and ob.pov.glow:
            ob.pov.mesh_write_as = 'NONE'
        else:
            ob.pov.mesh_write_as = ob.pov.mesh_write_as_old

    material_use_nodes: BoolProperty(name="Use nodes", description="", update=use_material_nodes_callback, default=False)
    material_active_node: EnumProperty(name="Active node", description="", items=node_enum_callback, update=node_active_callback)
    preview_settings: BoolProperty(name="Preview Settings", description="",default=False)
    object_preview_transform: BoolProperty(name="Transform object", description="",default=False)
    object_preview_scale: FloatProperty(name="XYZ", min=0.5, max=2.0, default=1.0)
    object_preview_rotate: FloatVectorProperty(name="Rotate", description="", min=-180.0, max=180.0,default=(0.0,0.0,0.0), subtype='XYZ')
    object_preview_bgcontrast: FloatProperty(name="Contrast", min=0.0, max=1.0, default=0.5)

#TODO?: class MaterialRaytraceTransparency(PropertyGroup):    
    
class MaterialRaytraceMirror(PropertyGroup):
    bl_description = "Raytraced reflection settings for the Material",  
    use: BoolProperty(
            name="Mirror", 
            description="Enable raytraced reflections",
            default=False)
            

    depth: IntProperty(
            name="Depth",
            description="Maximum allowed number of light inter-reflections",
            min=0, max=32767, default=2)

    distance: FloatProperty(
            name="Max Dist",
            description="Maximum distance of reflected rays "
                        "(reflections further than this range "
                        "fade to sky color or material color)",
            min=0.0, max=100000.0, soft_min=0.0, soft_max=10000.0, default=0.0, precision=3)

    fade_to: EnumProperty(
            items=[
                   ("FADE_TO_SKY", "Fade to sky", ""),
                   ("FADE_TO_MATERIAL", "Fade to material color", "")],
            name="Fade-out Color",
            description="The color that rays with no intersection within the "
                        "Max Distance take (material color can be best for "
                        "indoor scenes, sky color for outdoor)",
            default="FADE_TO_SKY")

    fresnel: FloatProperty(
            name="Fresnel",
            description="Power of Fresnel for mirror reflection",
            min=0.0, max=5.0, soft_min=0.0, soft_max=5.0, default=0.0, precision=3)

    fresnel_factor: FloatProperty(
            name="Blend",
            description="Blending factor for Fresnel",
            min=0.0, max=5.0, soft_min=0.0, soft_max=5.0, default=1.250, precision=3)

    gloss_anisotropic: FloatProperty(
            name="Anisotropic",
            description="The shape of the reflection, from 0.0 (circular) "
                        "to 1.0 (fully stretched along the tangent",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=1.0, precision=3)

    gloss_factor: FloatProperty(
            name="Amount",
            description="The shininess of the reflection  "
                        "(values < 1.0 give diffuse, blurry reflections)",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=1.0, precision=3)

    gloss_samples: IntProperty(
            name="Samples",
            description="Number of cone samples averaged for blurry reflections",
            min=0, max=1024, default=18)

    gloss_threshold: FloatProperty(
            name="Threshold",
            description="Threshold for adaptive sampling (if a sample "
                        "contributes less than this amount [as a percentage], "
                        "sampling is stopped)",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=0.005, precision=3)

    mirror_color: FloatVectorProperty(
            name="Mirror color",
            description=("Mirror color of the material"),
            precision=4, step=0.01,
            default=(1.0,1.0,1.0), options={'ANIMATABLE'}, subtype='COLOR')
            
    reflect_factor: FloatProperty(
            name="Reflectivity",
            description="Amount of mirror reflection for raytrace",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=1.0, precision=3)
            
class MaterialSubsurfaceScattering(PropertyGroup):
    bl_description = "Subsurface scattering settings for the material",          

    use: BoolProperty(
            name="Subsurface Scattering", 
            description="Enable diffuse subsurface scatting "
                        "effects in a material",
            default=False)

            
            
    back: FloatProperty(
            name="Back",
            description="Back scattering weight",
            min=0.0, max=10.0, soft_min=0.0, soft_max=10.0, default=1.0, precision=3)


    color: FloatVectorProperty(
            name="Scattering color",
            description=("Scattering color"),
            precision=4, step=0.01,
            default=(0.604,0.604,0.604), options={'ANIMATABLE'}, subtype='COLOR')

    color_factor: FloatProperty(
            name="Color",
            description="Blend factor for SSS colors",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=1.0, precision=3)

    error_threshold: FloatProperty(
            name="Error",
            description="Error tolerance (low values are slower and higher quality)",
            default=0.050, precision=3)

    front: FloatProperty(
            name="Front",
            description="Front scattering weight",
            min=0.0, max=2.0, soft_min=0.0, soft_max=2.0, default=1.0, precision=3)

    ior: FloatProperty(
            name="IOR", description="Index of refraction (higher values are denser)",
            min=-10.0, max=10.0,default=1.3)

    radius: FloatVectorProperty(
            name="RGB Radius",
            description=("Mean red/green/blue scattering path length"),
            precision=4, step=0.01, min=0.001,
            default=(1.0,1.0,1.0), options={'ANIMATABLE'})

    scale: FloatProperty(
            name="Scale",
            description="Object scale factor",
            default=0.100, precision=3)

    texture_factor: FloatProperty(
            name="Texture",
            description="Texture scattering blend factor",
            min=0.0, max=1.0, soft_min=0.0, soft_max=1.0, default=0.0, precision=3)
                
            # halo

                # Halo settings for the material
                # Type:	MaterialHalo, (readonly, never None)            
            # alpha¶

                # Alpha transparency of the material
                # Type:	float in [0, 1], default 0.0

            # ambient

                # Amount of global ambient color the material receives
                # Type:	float in [0, 1], default 0.0

            # darkness

                # Minnaert darkness
                # Type:	float in [0, 2], default 0.0

            # diffuse_color

                # Diffuse color of the material
                # Type:	float array of 3 items in [0, inf], default (0.0, 0.0, 0.0)

            # diffuse_fresnel

                # Power of Fresnel
                # Type:	float in [0, 5], default 0.0

            # diffuse_fresnel_factor

                # Blending factor of Fresnel
                # Type:	float in [0, 5], default 0.0

            # diffuse_intensity

                # Amount of diffuse reflection
                # Type:	float in [0, 1], default 0.0

            # diffuse_ramp

                # Color ramp used to affect diffuse shading
                # Type:	ColorRamp, (readonly)

            # diffuse_ramp_blend

                # Blending method of the ramp and the diffuse color
                # Type:	enum in [‘MIX’, ‘ADD’, ‘MULTIPLY’, ‘SUBTRACT’, ‘SCREEN’, ‘DIVIDE’, ‘DIFFERENCE’, ‘DARKEN’, ‘LIGHTEN’, ‘OVERLAY’, ‘DODGE’, ‘BURN’, ‘HUE’, ‘SATURATION’, ‘VALUE’, ‘COLOR’, ‘SOFT_LIGHT’, ‘LINEAR_LIGHT’], default ‘MIX’

            # diffuse_ramp_factor

                # Blending factor (also uses alpha in Colorband)
                # Type:	float in [0, 1], default 0.0

            # diffuse_ramp_input

                # How the ramp maps on the surface
                # Type:	enum in [‘SHADER’, ‘ENERGY’, ‘NORMAL’, ‘RESULT’], default ‘SHADER’

            # diffuse_shader

                    # LAMBERT Lambert, Use a Lambertian shader.
                    # OREN_NAYAR Oren-Nayar, Use an Oren-Nayar shader.
                    # TOON Toon, Use a toon shader.
                    # MINNAERT Minnaert, Use a Minnaert shader.
                    # FRESNEL Fresnel, Use a Fresnel shader.

                # Type:	enum in [‘LAMBERT’, ‘OREN_NAYAR’, ‘TOON’, ‘MINNAERT’, ‘FRESNEL’], default ‘LAMBERT’

            # diffuse_toon_size

                # Size of diffuse toon area
                # Type:	float in [0, 3.14], default 0.0

            # diffuse_toon_smooth

                # Smoothness of diffuse toon area
                # Type:	float in [0, 1], default 0.0

            # emit

                # Amount of light to emit
                # Type:	float in [0, inf], default 0.0

            # game_settings

                # Game material settings
                # Type:	MaterialGameSettings, (readonly, never None)

            # halo

                # Halo settings for the material
                # Type:	MaterialHalo, (readonly, never None)

            # invert_z

                # Render material’s faces with an inverted Z buffer (scanline only)
                # Type:	boolean, default False

            # light_group

                # Limit lighting to lamps in this Group
                # Type:	Group

            # line_color

                # Line color used for Freestyle line rendering
                # Type:	float array of 4 items in [0, inf], default (0.0, 0.0, 0.0, 0.0)

            # line_priority

                # The line color of a higher priority is used at material boundaries
                # Type:	int in [0, 32767], default 0

            # mirror_color

                # Mirror color of the material
                # Type:	float array of 3 items in [0, inf], default (0.0, 0.0, 0.0)

            # node_tree

                # Node tree for node based materials
                # Type:	NodeTree, (readonly)

            # offset_z

                # Give faces an artificial offset in the Z buffer for Z transparency
                # Type:	float in [-inf, inf], default 0.0

            # paint_active_slot

                # Index of active texture paint slot
                # Type:	int in [0, 32767], default 0

            # paint_clone_slot

                # Index of clone texture paint slot
                # Type:	int in [0, 32767], default 0

            # pass_index

                # Index number for the “Material Index” render pass
                # Type:	int in [0, 32767], default 0

            # physics

                # Game physics settings
                # Type:	MaterialPhysics, (readonly, never None)

            # preview_render_type

                # Type of preview render

                    # FLAT Flat, Flat XY plane.
                    # SPHERE Sphere, Sphere.
                    # CUBE Cube, Cube.
                    # MONKEY Monkey, Monkey.
                    # HAIR Hair, Hair strands.
                    # SPHERE_A World Sphere, Large sphere with sky.

                # Type:	enum in [‘FLAT’, ‘SPHERE’, ‘CUBE’, ‘MONKEY’, ‘HAIR’, ‘SPHERE_A’], default ‘FLAT’

            # raytrace_mirror

                # Raytraced reflection settings for the material
                # Type:	MaterialRaytraceMirror, (readonly, never None)

            # raytrace_transparency

                # Raytraced transparency settings for the material
                # Type:	MaterialRaytraceTransparency, (readonly, never None)

            # roughness

                # Oren-Nayar Roughness
                # Type:	float in [0, 3.14], default 0.0

            # shadow_buffer_bias

                # Factor to multiply shadow buffer bias with (0 is ignore)
                # Type:	float in [0, 10], default 0.0

            # shadow_cast_alpha

                # Shadow casting alpha, in use for Irregular and Deep shadow buffer
                # Type:	float in [0.001, 1], default 0.0

            # shadow_only_type

                # How to draw shadows

                    # SHADOW_ONLY_OLD Shadow and Distance, Old shadow only method.
                    # SHADOW_ONLY Shadow Only, Improved shadow only method.
                    # SHADOW_ONLY_SHADED Shadow and Shading, Improved shadow only method which also renders lightless areas as shadows.

                # Type:	enum in [‘SHADOW_ONLY_OLD’, ‘SHADOW_ONLY’, ‘SHADOW_ONLY_SHADED’], default ‘SHADOW_ONLY_OLD’

            # shadow_ray_bias

                # Shadow raytracing bias to prevent terminator problems on shadow boundary
                # Type:	float in [0, 0.25], default 0.0

            # specular_alpha

                # Alpha transparency for specular areas
                # Type:	float in [0, 1], default 0.0

            # specular_color

                # Specular color of the material
                # Type:	float array of 3 items in [0, inf], default (0.0, 0.0, 0.0)

            # specular_hardness

                # How hard (sharp) the specular reflection is
                # Type:	int in [1, 511], default 0

            # specular_intensity

                # How intense (bright) the specular reflection is
                # Type:	float in [0, 1], default 0.0

            # specular_ior

                # Specular index of refraction
                # Type:	float in [1, 10], default 0.0

            # specular_ramp

                # Color ramp used to affect specular shading
                # Type:	ColorRamp, (readonly)

            # specular_ramp_blend

                # Blending method of the ramp and the specular color
                # Type:	enum in [‘MIX’, ‘ADD’, ‘MULTIPLY’, ‘SUBTRACT’, ‘SCREEN’, ‘DIVIDE’, ‘DIFFERENCE’, ‘DARKEN’, ‘LIGHTEN’, ‘OVERLAY’, ‘DODGE’, ‘BURN’, ‘HUE’, ‘SATURATION’, ‘VALUE’, ‘COLOR’, ‘SOFT_LIGHT’, ‘LINEAR_LIGHT’], default ‘MIX’

            # specular_ramp_factor

                # Blending factor (also uses alpha in Colorband)
                # Type:	float in [0, 1], default 0.0

            # specular_ramp_input

                # How the ramp maps on the surface
                # Type:	enum in [‘SHADER’, ‘ENERGY’, ‘NORMAL’, ‘RESULT’], default ‘SHADER’
            # specular_shader

                    # COOKTORR CookTorr, Use a Cook-Torrance shader.
                    # PHONG Phong, Use a Phong shader.
                    # BLINN Blinn, Use a Blinn shader.
                    # TOON Toon, Use a toon shader.
                    # WARDISO WardIso, Use a Ward anisotropic shader.

                # Type:	enum in [‘COOKTORR’, ‘PHONG’, ‘BLINN’, ‘TOON’, ‘WARDISO’], default ‘COOKTORR’

            # specular_slope

                # The standard deviation of surface slope
                # Type:	float in [0, 0.4], default 0.0

            # specular_toon_size

                # Size of specular toon area
                # Type:	float in [0, 1.53], default 0.0

            # specular_toon_smooth

                # Smoothness of specular toon area
                # Type:	float in [0, 1], default 0.0

            # strand

                # Strand settings for the material
                # Type:	MaterialStrand, (readonly, never None)

            # subsurface_scattering

                # Subsurface scattering settings for the material
                # Type:	MaterialSubsurfaceScattering, (readonly, never None)

            # texture_paint_images

                # Texture images used for texture painting
                # Type:	bpy_prop_collection of Image, (readonly)

            # texture_paint_slots

                # Texture slots defining the mapping and influence of textures
                # Type:	bpy_prop_collection of TexPaintSlot, (readonly)

            # texture_slots

                # Texture slots defining the mapping and influence of textures
                # Type:	MaterialTextureSlots bpy_prop_collection of MaterialTextureSlot, (readonly)

            # translucency

                # Amount of diffuse shading on the back side
                # Type:	float in [0, 1], default 0.0

            # transparency_method

                # Method to use for rendering transparency

                    # MASK Mask, Mask the background.
                    # Z_TRANSPARENCY Z Transparency, Use alpha buffer for transparent faces.
                    # RAYTRACE Raytrace, Use raytracing for transparent refraction rendering.

                # Type:	enum in [‘MASK’, ‘Z_TRANSPARENCY’, ‘RAYTRACE’], default ‘MASK’

            # type

                # Material type defining how the object is rendered

                    # SURFACE Surface, Render object as a surface.
                    # WIRE Wire, Render the edges of faces as wires (not supported in raytracing).
                    # VOLUME Volume, Render object as a volume.
                    # HALO Halo, Render object as halo particles.

                # Type:	enum in [‘SURFACE’, ‘WIRE’, ‘VOLUME’, ‘HALO’], default ‘SURFACE’

            # use_cast_approximate

                # Allow this material to cast shadows when using approximate ambient occlusion
                # Type:	boolean, default False

            # use_cast_buffer_shadows

                # Allow this material to cast shadows from shadow buffer lamps
                # Type:	boolean, default False

            # use_cast_shadows

                # Allow this material to cast shadows
                # Type:	boolean, default False

            # use_cast_shadows_only

                # Make objects with this material appear invisible (not rendered), only casting shadows
                # Type:	boolean, default False

            # use_cubic

                # Use cubic interpolation for diffuse values, for smoother transitions
                # Type:	boolean, default False

            # use_diffuse_ramp

                # Toggle diffuse ramp operations
                # Type:	boolean, default False

            # use_face_texture

                # Replace the object’s base color with color from UV map image textures
                # Type:	boolean, default False

            # use_face_texture_alpha

                # Replace the object’s base alpha value with alpha from UV map image textures
                # Type:	boolean, default False

            # use_full_oversampling

                # Force this material to render full shading/textures for all anti-aliasing samples
                # Type:	boolean, default False

            # use_light_group_exclusive

                # Material uses the light group exclusively - these lamps are excluded from other scene lighting
                # Type:	boolean, default False

            # use_light_group_local

                # When linked in, material uses local light group with the same name
                # Type:	boolean, default False

            # use_mist

                # Use mist with this material (in world settings)
                # Type:	boolean, default False

            # use_nodes

                # Use shader nodes to render the material
                # Type:	boolean, default False

            # use_object_color

                # Modulate the result with a per-object color
                # Type:	boolean, default False