It looks like animating Opacity or Blend values of VrayBlendMtl does not work rendering sequences. Oddly enough it works in Vray IPR mode and on the VFB. But when rendering the sequence locally or on a render farm, it ignores the animation for the values. Sometimes it renders the coat material, others the base material (if starting frame is in middle transition), but never the transition.
I’m working with Maya 2022.3 and Vray 5 (update 2.1).
It’s a known issue (internal bug-tracker id: VMAYA-10537). An easy workaround is to map the Blend Amount with a Color Constant, which you key from black to white or vice versa.
Has this been fixed? I just had an overnight render fall foul of this.
Not quite yet. I’ll see if I can bump its priority.
Hi,
It looks like the issue hasn’t been fixed in the latest V-Ray 7 for Maya builds. I’m trying to animate the Opacity values of a VRayBlendMtl instead of the Blend values, but it’s not working correctly when using a Color Constant.
