Document how to avoid light leaks in GI Probes (godotengine#4784)

jasonliu-- · Mar 28, 2021 · 8c3d714 · 8c3d714
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commit 8c3d714
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diff --git a/tutorials/3d/gi_probes.rst b/tutorials/3d/gi_probes.rst
@@ -50,6 +50,12 @@ toolbar to begin the pre-baking process:
 
 .. image:: img/giprobe_bake.png
 
+.. warning::
+
+    Meshes should have sufficiently thick walls to avoid light leaks (avoid
+    one-sided walls). For interior levels, enclose your level geometry in a
+    sufficiently large box and bridge the loops to close the mesh.
+
 Adding lights
 -------------