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My look dev using GPU doesn't match the CPU render

4 REPLIES 4
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Message 1 of 5
square-zero-one
1080 Views, 4 Replies

My look dev using GPU doesn't match the CPU render

Hi,

Spend the last months exclusivly GPU I was very happy how quick I was turning out work,

The card over heated and now its for repair, so temporary I'm back to CPU.

But the result are now very different from GPU

Looks like shadows, hair shader and eyebrowns xgen density are not matching

Any ideas of what could go wrong?


Maya Ribbon versus Thick, something like that?

Now on cpu is to slow to test every single option.


Arnold

MtoA 4.0.0 - 7597cfz7 - Oct 15

CPU

Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz

GPU

MSI Armour RTX 2070- 8GB

5138-gpu-versus-cpu-1.jpg

5140-gpurendercompare.gif

Square-zero-one.com
https://www.facebook.com/squarezeroone
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  • gpu
4 REPLIES 4
Message 2 of 5

The headphones aren't shadow casting either. Is there light-linking in the scene?

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 3 of 5


The scene was like this:

5211-1574173275829.png

Even trying this :

5212-1574173335833.png

Still get the same result,

there is something going on with the scene, but I can't get the same result.

They are all rigged meshes


So i've export the scene as .ass

and playing witht the settings this one makes it work again

Override receive shadows....

5213-1574174812854.png


So that mean that GPU is ignoring this and CPU still uses it.

But where is this shadow linking done?


Thank you

Johnny




Square-zero-one.com
https://www.facebook.com/squarezeroone
Message 4 of 5

I think there is something wrong with the scene , as I've created the same light and it doesn't cast shadow anyway,

by exporting as .ass and forcing that parameter I got this result that has the proper shadows.

5214-gpurendercompare2.gif


what I can tell now is that the hair shader is not working properly between the GPU/CPU

This is the hair shader...5215-1574183266615.png


Square-zero-one.com
https://www.facebook.com/squarezeroone
Message 5 of 5
jnietoru
in reply to: square-zero-one

I'm having the exact same issue right now in Houdini with Solaris.
My viewport render looks perfect but then I render it to disk and it's all messed up.

Viewport:

jnietoru_2-1681256687165.png

 


Disk Render with the exact same settings.

jnietoru_1-1681256666062.png


It would be fantastic if autodesk could provide a fix or point a finger towards sideFX.

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