Hello!

I have a pane of glass that I am simulating with a rdbsolver. I made sure there were uvs on the geometry and velocity coming through the chain, but strangely when I import the .abc from Houdini into Maya2020, it plays back fine in the viewport, BUT when I try to render in Vray, no matter what frame I set it to, it just renders frame one.

I get these errors!

// Warning: V-Ray : Mesh "OUT_render" has changing number of vertices (681551 expected, 8 actual). //
// Warning: UV set sample size is: 0 expecting: 8 or 24 //
// Warning: normal vector scope does not match size of data, skipping normals //
// Warning: UV set sample size is: 1826043 expecting: 681551 or 1824325 //

1. Make sure you use vray proxy to load .abc and not maya directly

2. If your glass geo has changing topology use per frame .abc files and frame token in the proxy path

Otherwise vray messes up uvs and other attribs on frames when topology changes

And in the same case use v for velocity mblur