happy new year - fail - displacement & sss on RTX

V-Ray V-Ray for Maya Issues
1

Hello dear Vray people,

I was about to render this nice little video for clients and friends:
https://vimeo.com/785404264/448c67eab5

prerendering worked fine. then I upped the settings and problem number 1 came up:

- nasty flickering in some of the frames (as seen in the Vimeo video)
must be related to the snow material
it consists of a displacement and a SSS (form VrayMTL with translucency SSS)

while trying some of the other sss posibilities (fast SSS and AI surface) one of my workstations doesnt render the scene anymore, beeing stuck at “loading bitmaps”
this is related to out of memory. Why??? Its a tiny scene with a brand new RTX4080

This is a little fun scene, but I ran into the same problems with displacement and SSS just before in a real production (as posted before).

I am a small animation studio, switching from CPU to GPU fro production.
It appears to me, there are still some flaws in GPU rendering - but perhaps its some settings to be improved.

So here is the scene:
https://pipe.green-cloud.at/index.php/s/DJTEjyt23s2HStL

Thnx
Martin

1st machine
i7-9700 3GHZ
32 Gig ram
RTX 2080 & 3080ti

2nd machine
i7 13700
32 gig ram
RTX 4080
(this is the one failing to start)

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2

turned of camera motion blur - now it works
great - who needs motion blur anyhow :stuck_out_tongue:

3

is this a common thing with GPU rendering.
Do other engines suffer the same hiccups?

I was really excited about moving over to GPU. The render times are exciting. Thought the errors I had in the past were related to the lack of ram on the cards I could afford.
What should I wait for now? RTX9080 - 128Gig Ram

4

it happens constantly here. with and without motion blur.
https://vimeo.com/801586946

5

found a solution - going from RTX to Cuda mode. In Cuda no flickers

6

Hey!

Sorry about the inconvenience, I will take a look
The hang is not expected to happen, anything that I reproduce on my side I will make sure it gets fixed

Best,
Muhammed

7

Not directly related: Chaos’ support used to be great - this is literally two months later…