From 8130de948d78704db21b0b1e1e3aaadcd12a0c3f Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brechtvanlommel@gmail.com>
Date: Wed, 12 Feb 2020 11:31:30 +0100
Subject: [PATCH] Fix T64584: error in node wrangler with cycles add-on
disabled
---
node_wrangler.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/node_wrangler.py b/node_wrangler.py
index f1aa1e0c0..a9ac84770 100644
--- a/node_wrangler.py
+++ b/node_wrangler.py
@@ -1703,7 +1703,9 @@ class NWEmissionViewer(Operator, NWBase):
make_links.append((emission.outputs[0], materialout.inputs[0]))
# Set brightness of viewer to compensate for Film and CM exposure
- intensity = 1/context.scene.cycles.film_exposure # Film exposure is a multiplier
+ if context.scene.render.engine == 'CYCLES' and hasattr(context.scene, 'cycles'):
+ intensity = 1/context.scene.cycles.film_exposure # Film exposure is a multiplier
+
intensity /= pow(2, (context.scene.view_settings.exposure)) # CM exposure is measured in stops/EVs (2^x)
emission.inputs[1].default_value = intensity
--
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