Hi,
I’m actually having this exact same issue right now - It just randomly happened (after an auto-save, maybe?), and now I just can’t use this map anymore, which sucks pretty hard.
If anyone has an idea on how to debug this, or what file you’d need from me to check this, it’d be GREAT. Thanks!
Edit : a few screenshots to show how it looks.
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Same camera, Landscape is not selected, stuff stops being rendered and the more “Buggy landscape” is on viewport, the more lag it creates (at most, engine will draw 1 frame every ~8 seconds).
(Version 4.7.6)