Hi all. I’m trying to render a pretty complex scene (poly heavy foliage) with motion blur. I’ve tried using the velocity channel of render elements, but haven’t been very impressed. I tried the Motion Vector Export shader in the camera output slot and it works nicely with my scene.
Now my question: how does one go about saving this “pass” along with the beauty pass in the same render job? Reading over the Production Shader Library help file gives some hints on “pseudo .mi syntax” for creating separate frame buffers, but it’s over my head. I understand max scripting, and sort of understand this pseudo syntax after checking the mental ray help file, but don’t even know where to start with this shader modification.
I have made some not so graceful hacks to production_max.mi resulting in lots of errors, but no separate frame buffer with vectors. Am I making this more difficult than necessary, or is it time to brush up on shader writing? Thanks