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Sébaste Thifault avatar image
Sébaste Thifault asked ·

Displacement issue CPU vs GPU

I realized that some refraction/reflection difference in CPU vs GPU in render test I was doing where related to displacement.

Not sure what is the problem, so I did some more test ! here are some pictures.


Simple grid, area light, simple arnold noise....subdivision set to 7

The CPU version is not displaced correctly.

It's ok in Maya.

Latest Houdini and Arnold

Cheers


CPU

GPU

displacementhtoa
cpu.jpg (650.2 KiB)
gpu.jpg (679.1 KiB)
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Stephen Blair avatar image
Stephen Blair answered ·

Looks like bounds padding to me. Did you check the Arnold log?
Displacement is done on the CPU in either case.

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this is just switching from GPU to CPU, padding should be the same. Did the same scene in Maya with exactly the same units, it's identical.


Thanks



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If you can upload the scene we'll test it here.

This happens when you switch devices while the IPR is running?

OR do you restart the render completely?

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