Guys, can you please advise why when baking lightmap for modular environment through GPU Lightmass there are light leaks ? How to fix it ?
I would start by checking the baking against the path-tracer- make sure your geometry truly is watertight, if things are off by even a very small amount you will have problems.
After that, I’d start to figure out what sort of artifacts you’re dealing with, if it’s a problem with ray biasing, some issue wtih the irradiance cache, or if your lightmaps are having resolution problems. Just a few places to start.