Displacement issue CPU vs GPU

[s.thifault]

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

[Stephen.Blair]

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

[s.thifault]

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

[Stephen.Blair]

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?