Drivers linked to Lamp data_paths dont update. #42180
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Reference: blender/blender#42180
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System Information
OSX 10.9.4 NVIDIA GeForce GT 650M 1024 MB
Blender Version
Broken: tested 2.67-2.72 all broken
Short description of error
When using Drivers that link to a Lamps properties, they dont seem to update each frame, or on render.
the only way i was able to update the driver is by duplicating the object with the drivers. (in this case, the Cube)
Exact steps for others to reproduce the error
in attached blend, 2 keyframes have been added for the light's color. the Cube's material color is using these as drivers.
if you change frame, or render, nothing changes. If you duplicate the Cube, the color updates.
light_drivers.blend
Changed status to: 'Open'
Added subscriber: @LevonHudson
Added subscriber: @JoshuaLeung
At the core of the issue is the fact that currently only Object and "Object Data" (aka "geometry") datablocks get tracked by the depsgraph, and nothing else.
IIRC, I once tried tracking down a similar issue, but in the end couldn't figure out why it wasn't updating, even after various hacks and workarounds.
Anyway, this should be easily solved as part of the depsgraph refactor
Changed status from 'Open' to: 'Archived'