GPU Lightmass support for RX7000/RDNA3 GPU's

RegulaSmegula
Thu, 10 Apr 2025 21:33:21 +0000
Rendering

My question is simple, what are the known issues/compatibility for GPU lightmass lightmap baking with AMD RX7000/RDNA3 GPU’s? I am using an RX 7900 XTX and I have had zero success with baking light maps through GPU lightmass. It does not correctly bake either GI or shadows. This is awfully inconvenient as the only NVIDIA GPU I have access to only has 8GB’s of VRAM (an RTX 3070 mobile with a 140 watt TGP). Are there specific settings that will get GPU Lightmass to work on RDNA 3 GPU’s? Or does it simply not function? Thanks in advance to anyone who responds.

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