# GPU Lightmass support for RX7000/RDNA3 GPU's

**URL:** <https://forums.unrealengine.com/t/gpu-lightmass-support-for-rx7000-rdna3-gpus/2450307>\
**Category:** Rendering\
**Tags:** Lightmass, building-lighting, light, baked-lighting, static-lights, lighting-build, light-build, unreal-engine, Lightmap, question\
**Created:** [April 10, 2025, 9:33pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-support-for-rx7000-rdna3-gpus/2450307 "2025-04-10T21:33:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![stormergames001](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@stormergames001](https://forums.unrealengine.com/u/stormergames001)\
**Post date:** [April 10, 2025, 9:33pm UTC](https://forums.unrealengine.com/t/gpu-lightmass-support-for-rx7000-rdna3-gpus/2450307/1 "2025-04-10T21:33:22Z")

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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.