I’m trying to set up GPU Lightmass baking for my architectural scene. I’ve enabled the GPU Lightmass plugin, along with Ray Tracing and Virtual Texture Support/Virtual Texture Lightmaps. I’ve got the RHX set to Directx 12. But when I go to Bake > GPU Lightmass, the “Build Lighting” button is greyed…

So you need a couple of things (most mentioned above, but you need all of them): A Ray Tracing Capable GPU, like an NVIDIA RTX card or latest gen AMD In plugins, enable the GPU Lightmass plugin In project settings, set RHI to DX12 In project settings, Enable Virtual Texture Support and Enable Virt…

GPU Lightmass disabled

Development Rendering

anonymous_user_6cf23fb3 (anonymous_user_6cf23fb3) March 18, 2022, 3:49pm 12

Try disabling the RenderDoc plug-in if you have it enabled.

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