Batch rendering problems with Animated shader attributes using Mental Ray

Maya batch rendering with Mental Ray when you have keyframed shader attributes that have set driven keys on them will cause problems . For example I have a blendcolor setup that blends between weights on a MIB_color_mix using a set driven key on a rig.

The fix: The fix is to disable the “Optimize animation detection” option in the Mental Ray render globals “Options” tab under ‘Performance‘ roll out.

This will have a hit on the render times, but may solve issues with keyframed shader / texture attributes.

From testing its about a 15-20 percent increase time per frame during rendering.optimize animation detection mental ray

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