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So I have C4D R21, latest nVidia Drivers, Arnold 6 and when I use include/exclude from Arnold lights or C4D Lights in CPU works as expected but in GPU is not working the exclusion/inclusion in the project tab.
Is that a bug ?? Any Solution ?
It's a limitation, unfortunately light linking is still not supported on the GPU.
https://docs.arnoldrenderer.com/display/A5ARP/Supported+Features+and+Known+Limitations