Maya passes and Motion Vector Pass messed up in composite ?

[andy gee]

Hi all

I just wanted to ask Is there a bug with Maya's motion vector pass and other passes ?

My first render layer which was an open exr file had:

.Diffuse material colour
.Indirect.
.Specular
.reflection
.MotionVector

In my composite comp I noticed that the edges didn't match with the rest of my imported sequences, I first thought it might be a size issue it wasn't. I did a test on all my passes one at a time going through my list starting with the diffuse then adding all passes ending with motion vector each time I replaced each pass in composite it was fine until I rendered out with a motion vector which resulted in the funny slight offset around certain edges. Is this a bug with motion vectors ? Should I render Motion vectors on a separate render layer ? or even a separate scene ?

If this is the problem and somebody has come across this before then any info would be great.

thanks

Andy Gee

[dan]

Hey Andy! If you're getting issues with edges, breaking up your motion vectors could help. However, rather than adding render time by adding render layers you could set this up with contribution maps. Here's a quick video on how that looks:


20925258

You may also want to look into disabling hold out for some of your passes. That's covered in the course I mentioned in the video, Advanced Compositing Workflows with Maya and Toxik (http://www.digitaltutors.com/09/training.php?cid=5&pid=214).