tyBitmap in VRay?

[Howard Day]

So I'm trying to do some particle age linked billboards in VRay (Gotta explode some x-Wings, natch), and I can't seem to get the system to work with tyBitmap. Works great in scanline, but under VRay, it claims the material isn't supported. I assume I can't be the first person to run into this.
Help?

[tyFlow]

Can you post the error you're receiving verbatim, as well as what version of max/VRay you're using? Perhaps the scene file as well. Also what kind of material have you put the tyBitmap inside?

tyBitmap should be compatible with any renderer...it's an exact clone of max's Bitmap texmap with the only changes being made to the way frames are interpreted by the image sequence sync method.

[Howard Day]

Okay, here's the error - keep in mind, I'm using a tyBitmap twice in this scene.
https://drive.google.com/open?id=1_CgQBx...vXYgvsejVh
I'm using 3dsMax 2018, and VRay NEXT 3 GPU. 4.30.00.
Here's the source files (saved in Max 2016 format)
https://drive.google.com/file/d/1c3tFoRZ...sp=sharing
I have verified that normal old Bitmaps work just fine.
Thanks!

[tyFlow]

Ah, it's possible that ChaosGroup has only made VRay GPU compatible with texmaps they've specifically white-listed by ClassID. I wasn't aware of that until seeing the error you posted, but I now remember that they did a similar thing with certain types of scene objects (only white-listed object types are supported...for a while things like proxies and other types were not supported).

Might be worth raising the issue with them. In the meantime you'll have to stick to CPU mode to render tyBitmaps. Not much I can really do on my side since the issue is with VRay code.

One potential workaround: default Bitmaps do texture syncing with MatIDs instead of UVWs....you could experiment with changing particle MatIDs to match the frame of the sequence you want to play back, and see if the Bitmap texmap will sync to it that way....