Realflow meshes won't update when frame changes

[stevegh]

I assume this has more to do with the Realflow plugin than it does with V-Ray RT, but some callback somewhere is not telling V-Ray RT that the Realflow mesh has changed once the frame changes, so it uses the same mesh the whole time. Any ideas?

-Steve

[vlado]

Does it update in the viewport? V-Ray RT uses the object validity interval to figure out if it needs to be updated or not. If the RealFlow mesh does not return this information correctly, then V-Ray RT has no way of knowing it.

Best regards,
Vlado

[stevegh]

Yes it does update in the viewport.

[stevegh]

If I change a parameter in the RFMeshLoader plugin object it forces an update, dunno if that helps. :/

[vlado]

If you select the realflow mesh, open a maxscript listener and type

vrscene_nodeMeshValidity $ currentTime

what do you get?

Best regards,
Vlado

[stevegh]

....but I have to actually manually update a parameter, trying to key a parameter doesn't cause an update even though a value is changing.

[stevegh]

It returns:

(interval 41f 41f)

at frame 41, and it works at every frame, returning interval fr# fr#.

[vlado]

Hm ok. Does the ActiveShade window refresh at all (i.e. re-start the rendering)? If yes, you can try turning on the paricles check-box in the RT settings and see if it helps.

Best regards,
Vlado

[stevegh]

It looks like if I put a relax modifier on top of the RF plugin and set it to 0 it does work. The active shade window does update, and in the viewport I see the mesh has changed, VrayRT doesn't see it though. How do I check the Particle systems check box if it's greyed out?

Thanks Vlado,
-Steve

[stevegh]

OK figured out the particle systems check box, still doesn't update the mesh properly even though it does update the active shade. Looks like I will use the modifier solution for now....

[vlado]

You need to close the ActiveShade window, then you can change it - it is not possible to toggle it while the ActiveShade is running.

Best regards,
Vlado

[stevegh]

Just FYI to others having this problem, adding the modifier doesn't always work: some frames the mesh goes completely bonkers and it still likes to not update for a few frames. :/

[stevegh]

Hey Vlado,

Any more thoughts on this? It would be very sweet to be able to kick out fluid previews with VrayRT.

Thanks,

[vlado]

Nope, I'm afraid I'm out of ideas. I have to reproduce this here to see what's going on - any help in this direction is welcome

Best regards,
Vlado

[Paul Oblomov]

What kind of help you need ? I can send you simple simulation. Plugins for 3dsmax itself are free...