Anyone know what could be causing this? CPU Lightmapper works fine but takes 10 million billion Carl Sagan years. The settings are the exact same as I use in a different scene, where the issue does not appaer. So I’m quite baffled. Did I forget to install the ‘Make GPU Lightmapper work consistently’ package? And what packages does that pacakage depend on or conflict with? Do I need to also get the 'Solve package conflicts when installing the ‘Make GPU Lightmapper work consistently’-package package? Questions upon questions, the joys of working with Unity.
Which Unity version are you using? Keep in mind that GPU PLM is still in a preview state, so issues are expected.
What you are seeing here are NaNs. Those could be caused by a multitude of reasons. Have you tried looking through a pinned post on how to manage such artifacts?