Rubber Material renders probably on CPU with Arnold 5.4.0.0 C4DtoA 2.6.0
same Rubber Material with GPU Arnold 5.4.0.0 C4DtoA 2.6.0
Node
arnold-shader-network-editor.jpg
Scene Files
c4dtoa-gpu-rubber-material-test-scene.zip
hdr.zip
ramp_rgb Connected colors and positions not supported.
https://docs.arnoldrenderer.com/display/A5ARP/Supported+Features+and+Known+Limitations
I think that's why ...
I'm not seeing anything that sticks out in the shading network. Could you export this to an .ass file for me please? I don't have C4D to hand.
Thanks for having a look.
FYI
Windows 10
GeForce RTX2070
NVIDIA Studio Drivers 431.70
Optix 6.0
rubber-material.ass
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