By the end of this video, I hope you will feel more comfortable about using drivers on any kind of property on any kind of datablock. This is for the intermediate Blender user who feels comfortable with the Blender UI, but no prior experience is expected with drivers or Python scripting. We'll look at some secret ways to coerce drivers to work on any material, texture, or node property. More at the blog: millermattson.com/dave/?p=150 .
The little bit of python code referred to the video can be copied from the blog post at millermattson.com/dave/?p=150 .
Update: New in Blender 2.64 -- For randomizing material properties, the new Object Info node and its random number output could be an alternative to the driver technique described in this video. For more info, see wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Object_Info
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