ui.py

    DATA_PT_POV_vertex_groups,
    DATA_PT_POV_shape_keys,
    DATA_PT_POV_uv_texture,
    DATA_PT_POV_vertex_colors,
    DATA_PT_POV_customdata,
    #PovLampButtonsPanel,
    LIGHT_PT_POV_preview,
    LIGHT_PT_POV_light,
    POV_LIGHT_MT_presets,
    AddPresetLamp,
    OBJECT_PT_povray_obj_rainbow,
    RENDER_PT_povray_export_settings,
    RENDER_PT_povray_render_settings,
    RENDER_PT_povray_photons,
    RENDER_PT_povray_antialias,
    RENDER_PT_povray_radiosity,
    POV_RADIOSITY_MT_presets,
    AddPresetRadiosity,
    RENDER_PT_povray_media,
    MODIFIERS_PT_povray_modifiers,
    MATERIAL_PT_POV_sss,
    MATERIAL_MT_POV_sss_presets,
    AddPresetSSS,
    MATERIAL_PT_povray_activate_node,
    MATERIAL_PT_povray_active_node,
    MATERIAL_PT_POV_mirror,
    MATERIAL_PT_povray_reflection,
    #MATERIAL_PT_POV_interior,
    MATERIAL_PT_povray_fade_color,
    MATERIAL_PT_povray_caustics,
    MATERIAL_PT_povray_replacement_text,
    TEXTURE_MT_specials,
    TEXTURE_PT_POV_context_texture,    
    TEXTURE_PT_povray_type,
    TEXTURE_PT_povray_preview,
    TEXTURE_PT_povray_parameters,
    TEXTURE_PT_povray_tex_gamma,
    OBJECT_PT_povray_obj_parameters,
    OBJECT_PT_povray_obj_sphere,
    OBJECT_PT_povray_obj_cylinder,
    OBJECT_PT_povray_obj_cone,
    OBJECT_PT_povray_obj_superellipsoid,
    OBJECT_PT_povray_obj_torus,
    OBJECT_PT_povray_obj_supertorus,
    OBJECT_PT_povray_obj_parametric,
    OBJECT_PT_povray_replacement_text,
    POVRAY_MT_primitives_add_menu,
    BasicShapesMenu,
    ImportMenu,
    NodeMapCreateMenu,
    CAMERA_PT_povray_cam_dof,
    CAMERA_PT_povray_cam_nor,
    CAMERA_PT_povray_replacement_text,
    TEXT_OT_povray_insert,
    TEXT_MT_insert,
    TEXT_PT_povray_custom_code,
    TEXT_MT_templates_pov
)


def register():
    #from bpy.utils import register_class

    for cls in classes:
        register_class(cls)

    bpy.types.VIEW3D_MT_add.prepend(menu_func_add)
    bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
    bpy.types.TEXT_MT_templates.append(menu_func_templates)
    bpy.types.RENDER_PT_povray_radiosity.prepend(rad_panel_func)
    bpy.types.LIGHT_PT_POV_light.prepend(light_panel_func)
    #bpy.types.WORLD_PT_POV_world.prepend(world_panel_func)
    # was used for parametric objects but made the other addon unreachable on
    # unregister for other tools to use created a user action call instead
    #addon_utils.enable("add_mesh_extra_objects", default_set=False, persistent=True)

    #bpy.types.TEXTURE_PT_context_texture.prepend(TEXTURE_PT_povray_type)

def unregister():
    #from bpy.utils import unregister_class

    #bpy.types.TEXTURE_PT_context_texture.remove(TEXTURE_PT_povray_type)
    #addon_utils.disable("add_mesh_extra_objects", default_set=False)
    #bpy.types.WORLD_PT_POV_world.remove(world_panel_func)
    bpy.types.LIGHT_PT_POV_light.remove(light_panel_func)
    bpy.types.RENDER_PT_povray_radiosity.remove(rad_panel_func)
    bpy.types.TEXT_MT_templates.remove(menu_func_templates)
    bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)
    bpy.types.VIEW3D_MT_add.remove(menu_func_add)

    for cls in reversed(classes):
        unregister_class(cls)