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V-Ray Light Gen, in some versions, fails to write temporary HDRI preview files to a path containing a space. It silently fails. No error. Just a dead, dark dome.
Alex thought, "No problem. I'll use V-Ray Light Gen. Click a preset. Done." vray light gen not working
Restart the software and try running Light Gen again to force a fresh initialization. Update Your Version V-Ray Light Gen, in some versions, fails to
You need to lower the resolution of the Light Gen previews. Many users miss the settings cog within the Light Gen window. Lowering the preview resolution from the default (often 100%) to 50% or even 25% significantly reduces the VRAM and RAM load. This allows the engine to process the lighting variations without crashing your system. Just a dead, dark dome
They Googled furiously: "vray light gen not working" — and found forum threads from 2018, vague mentions of "paths," and a buried comment about "Windows usernames with spaces."
