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Maniphest T39162

Drivers on cycles node values don't update for speaker data object target variables.
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Description

Win32 Nvidia

Blender Version
Broken: 2.7
Worked: never AFAICT. Recently found the workaround by adding a non speaker target var to driver.

Drivers on cycles nodes with target variables that are custom properties on speaker data objects don't update.

speaker_data_object_cycles_driver_bug.blend79 KBDownload

There is a driver in the attached blend file.

With var_001 a custom prop "prop" on cube it succesfully changes color of cube, using the keyframed data on custom property "prop" on bpy.data.speakers["Speaker"]

Remove var_001 and the driver no longer has effect.

Event Timeline

Peter Staples (batfinger) created this task.Mar 13 2014, 4:32 PM
Peter Staples (batfinger) raised the priority of this task from to 90.
Peter Staples (batfinger) updated the task description. (Show Details)
Peter Staples (batfinger) added projects: BF Blender, Cycles.
Peter Staples (batfinger) edited a custom field.
Peter Staples (batfinger) added a subscriber: Peter Staples (batfinger).
Bastien Montagne (mont29) changed the task status from Unknown Status to Unknown Status.Mar 13 2014, 5:46 PM
Bastien Montagne (mont29) claimed this task.

Drivers do not work well (if at all) with nodes, this is a known limitation of current code… Thanks for the report, anyway.