Normally shadows work just fine, but with this project peculiar artefacts appear within the shadowing. Some are even internal artefacts. Here are screen grabs with shadows turned on and off:
pfff, you are so quick to rule out actual ghosts…
In the shadow panel, there is an option to show shadows from the edges. Never saw a difference using this one or not, but since we see a few edges here and there, maybe they aren’t casting shadow ? long stretch, I know
yeah UTC is precisely the time for Greenwich meridian.