I've created an Xgen description whose instances are assigned random colours using an aiUserDataColor and expression like the following article: assigning colors to primitive archives
By rendering CPU Arnold, each instance has different colours as I expected.
However, set to GPU, all of them lose colours and turn into the default of the node in question.
it seems not supported by GPU Arnold
Actually, I found the official guide says "User data inherited from parent procedurals is not currently supported" and I think this may be the cause.
Then, how should I avoid the issue?
Thank you.
