Flashing VDB clouds issue

Development Rendering
1

We have followed this tutorial:

But we get a lot of flashing issues:

With 3090 gpu, this trick helps:
Change the r.SparseVolumeTexture.Streaming.PrefetchMipLevelBias value to negative
But with a 4090 workstation this fix doe not help:

Mr Arghanion commented on this:
“Yeah, the console command forces the engine to play the sequence without using MIP levels - is this not correctly working on the 4090 after the command is added?
I don’t think this issue would be removed in any other way apart from the console command until Epic update their SVT reader for the Heterogenous Volume. Maybe 5.4 will fix it.”

Anyone knows how to fix this?

2

Anyone got a fix for this yet?

3

I’m getting this too with 5.4, hoping for a fix too : (

4

image
image1146×691 76.9 KB
Try to increase Streaming Pool Size Facor, Not sure its the proper way, but it worked for me. Double click on vdb import data.

4 Likes
5

Thank you so much @Skezios! I never thought to look there at the individual VDB’s settings. That worked great! I’ll look for a CVAR too so I can trigger it in the MRQ to keep my working FPS high. Thanks again, you rock!

7

Interesting! it worked for me but not for all VDBs. thanks a lot anyway!

8

Thanks!