Unreal Engine on Twitter: "Give your CPU a break. The GPU Lightmass in #UE4.27 is a light-baking solution that uses the GPU instead to significantly reduce the time needed to bake lighting
GPU Lightmap Baking in Unreal Engine - Evermotion.org
GPU Lightmass Global Illumination | Unreal Engine Documentation
GPU Lightmass Global Illumination | Unreal Engine Documentation
GPU Lightmass Global Illumination | Unreal Engine Documentation
GPU Lightmass Global Illumination | Unreal Engine Documentation
Tried GPU Lightmass to bake the lighting. It's insanely fast and gives better indirect lighting and shadows. Baked lighting for a 3bhk within an hour. Rendered 360 images to create virtual tour