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Lighthing Region

We need some feature like “Render region” (in Vray) for static lighting. Its needly to preview some areas in the architecture workflow. We can’t build complete scene’s lighthing for hours and obtain a bad result.

It’s a bit more difficult since you need to account for objects outside of your region affecting stuff inside the region. Given that you have to process everything outside anyway, a lightmass importance volume pretty much does what you want.