Spot light creating square lighting

Spot light creates square light bounding, which seem to be somewhat aligned to terrains voxel grid, it only happens in one of my places, both in studio and in game

It seems to only happen when in specific spots or rotation too, moving it in any direction can but doesnt always fix it
I have been unable to reproduce it in any other place, so it may have to do something with the games terrain size

It can be observed in game


Expected behavior

Regular round light and shadows

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I’m not 100% sure but I believe this is an issue related to the shadow map? One of the lighting engineers might be able to tell what’s going on here. I remember some lights get affected weirdly if the shadow map texture has shadows placed at incorrect locations?

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The spot light square shadows are caused by the large FakeWater mesh in the scene. After moving the parented part down 8 studs, the spot light influence returns to normal.
Alternatively, you could split FakeWater into multiple regions to not interfere with lighting, tweak the light range (63 works for me now that extended light ranges are out), or disable shadows on the spot light as a workaround.

Thanks for the report!