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Johnny Grilo avatar image
Johnny Grilo asked ·

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

gpu
gpu-versus-cpu-1.jpg (116.2 KiB)
gpurendercompare.gif (523.9 KiB)
gpurendercompare.gif (523.9 KiB)
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Johnny Grilo avatar image
Johnny Grilo answered ·

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.


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

This is the hair shader...



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Johnny Grilo avatar image
Johnny Grilo answered ·


The scene was like this:

Even trying this :

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....


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

But where is this shadow linking done?


Thank you

Johnny





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Lee Griggs avatar image
Lee Griggs answered ·

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

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