Math Node CPU/GPU Bug?

HoppyHopp · Post by **HoppyHopp** » Mon Sep 21, 2020 8:03 pm

Hey,
i played arround mixing a normal and bump map. When i use "Add" there is a big difference between CPU and GPU.
It is the same with "Subtract" but no problem when i use "Mix", "Multiplay" or "Divide"

CPU

GPU

Nodes

Post by **Dade** » Mon Sep 21, 2020 10:19 pm

What Lux version are you using ? Can you post a simple test scene with a cube and your material definition ?

HoppyHopp · Post by **HoppyHopp** » Thu Oct 08, 2020 3:00 pm

Here i have another missmatch between CPU and GPU.
CPU

GPU

Nodes

I attached the blend-file

HoppyHopp · Post by **HoppyHopp** » Fri Oct 09, 2020 9:12 pm

I tried now 2.4 and latest 2.5 version. Still the sam difference between cpu and gpu.
Can someone reproduce the problem with my file and can solve the problem?

HoppyHopp · Post by **HoppyHopp** » Mon Oct 19, 2020 8:27 am

Nobody can help?

Dez! · Post by **Dez!** » Mon Oct 19, 2020 9:01 am

my video driver breaks down.
the system goes into a black screen.
checked three times. only reset helped three times

Post by **FarbigeWelt** » Tue Oct 20, 2020 4:31 pm

HoppyHopp wrote: Mon Oct 19, 2020 8:27 am Nobody can help?

: Forum_Spiral_cpu

: Forum_Spiral_gpu

Similar result like yours.

HoppyHopp · Post by **HoppyHopp** » Wed Oct 21, 2020 9:29 am

FarbigeWelt wrote: Tue Oct 20, 2020 4:31 pm
Similar result like yours.

So how do we fix it? I mean there shouldn't be a difference, right?

Post by **FarbigeWelt** » Wed Oct 21, 2020 3:42 pm

HoppyHopp wrote: Wed Oct 21, 2020 9:29 am
FarbigeWelt wrote: Tue Oct 20, 2020 4:31 pm
Similar result like yours.
... I mean there shouldn't be a difference, right?

Correct. Some one should open an Issue in Github.

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Math Node CPU/GPU Bug?

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