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Godot Hack: How to get 6x faster omni lights! #godot #godotengine

really cool hack! I wonder if it's possible to expose a thingy that lets you control which sides of the cubemap get rendered...

29/6/25, 9:22 am0 reposts2 likes

fragskye

@fragskye.dev

29 June 2025

I would love it if someone made a PR! Rendering all 3 sides making up a corner would be even better than these spotlights But it's probably not an easy task with how core it is, and I don't know if the maintainers want the tech debt. Also not sure it'd be possible to handle smoothing out the edges.

jitspoe

@jitspoe.bsky.social

30 June 2025

@clayjohn.bsky.social Would it be viable to have an option to select what parts of an omniblight cast shadows? Probably would have an ugly, hard edge and not a smooth transition like this method, though.

Clay John

@clayjohn.bsky.social

30 June 2025

Is the idea just that it would be faster? I would prefer an option to cache shadows per-face, so Godot just updates each face when needed. Godot currently updates all six faces whenever anything in range moves, but we could get away with updating less.

fragskye

@fragskye.dev

30 June 2025

Sadly, caching can't help if the lights move like they do in the video, and they still take up spots in the shadow atlas. In my game's scenario, I would only be able to have high res shadows for the lantern in the player's hand + 2 overhead lights before it falls back to low resolution for the rest

Clay John

@clayjohn.bsky.social

30 June 2025

Having users select individual faces manually seems like a nightmare in terms of design issues and would certainly lead to some unwelcome complexity in the renderer.