Motion blur on animated extrude or growing paint effect

[bobvelocity]

Hello there

We are getting some strange results when trying to render a animated extrude with Vray. There is a error that says

"Warning: Mesh "extrudedTest1MainShape" has changing number of vertices (882 expected, 912 actual)"

So it just don't render motion blur. We also tested with exporting it as alembic, but with no luck.

any ideas??

[vlado]

You will need to export vertex velocity information; not sure how this is done with Alembic though.

Exporting a .vrmesh file with a small velocity time interval might work too, so long as the change of vertices does not happen inside that interval...

Best regards,
Vlado