Strange artifacting with spot light. | Official Unity Discord | Page 1

near jasper Oct 15, 2025, 2:15 AM

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Getting strange artifacting with a spot light. Any idea what may cause this?

native sage Oct 15, 2025, 7:56 AM

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near jasper Getting strange artifacting with a spot light. Any idea what may cause this?

They seem to line up with screen tiles which are used by forward+ rendering and HDRP to manage light limits per tile rather than per mesh
Typically you get those jaggies when a tiles are exceeding their light limits, but can also be caused by various bugs

near jasper Oct 15, 2025, 7:56 AM

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i see

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i am using forward+ but i'm using URP

native sage Oct 15, 2025, 7:57 AM

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I'd first try to tally up how many light ranges are intersecting at that point
There may be a light overlap debug view for that purpose

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Not the baked light overlap, but in the rendering debugger if I remember correctly

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With forward+ the light limit per tile is 256 on desktop, 32 or 16 on mobile platforms

near jasper Oct 15, 2025, 7:59 AM

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thanks for the info, i'll see what the rendering overlays tell me and see if messing around with the URP lighting settings helps at all

native sage Oct 15, 2025, 7:59 AM

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If you clearly don't have hundreds or even dozens overlapping light ranges, I'd look into bugs

#Strange artifacting with spot light.