Different Output between CPU and OpenCL

[Theverat]

This new example scene shows very different output between PathCPU and PathOCL on my notebook's OpenCL CPU device: https://github.com/LuxCoreRender/LuxCoreTestScenes/tree/master/scenes/ProceduralLeaves

Here's the rendered output, note that the CPU render has some more samples than the OCL render, but I hope the problem is already visible:

PathCPU:

PathOCL:

The leaf meshes have no thickness, the material is glossytranslucent.

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[Theverat]

The problem might be in the OpenCL bump code.

I replaced the glossytranslucent material with matte and fed only the bump into it.
ProceduralLeaves_onlybump.blend.zip

This is what is fed into the bump socket:

Bump input CPU:

Bump input OCL:

And this is the result of the bump:

Bump result CPU:

Bump result OCL:

The bump input is identical, but the result is different.

[Dade916]

I should have fixed this problem.