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Document LightmapGI rendering limits in Mobile and Compatibility renderers #11013

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Document LightmapGI rendering limits in Mobile and Compatibility renderers #11013

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14 changes: 11 additions & 3 deletions tutorials/3d/global_illumination/using_lightmap_gi.rst
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Expand Up @@ -645,6 +645,14 @@ Reducing LightmapGI artifacts

If you notice LightmapGI nodes popping in and out of existence as the camera
moves, this is most likely because the engine is rendering too many LightmapGI
instances at once. Godot is limited to rendering 8 LightmapGI nodes at once,
which means up to 8 instances can be in the camera view before some of them will
start flickering.
instances at once.

Here are the limits for each renderer:

- **Forward+**: Up to 8 LightmapGI nodes can be rendered at once.
- **Forward Mobile**: Up to 2 LightmapGI nodes can be rendered at once.
- **Compatibility**: An unlimited number of LightmapGI nodes can be rendered at once.

If this limit is exceeded, meshes that use lightmaps from extraneous LightmapGI
nodes will not display lightmaps on them. Dynamic objects within their bounds also
won't receive lighting.