Normal map not working with point light | Bevy | Page 1

onyx lily Apr 7, 2023, 4:19 PM

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I added normal map to Icosphere, i use point and ambient light, in *bevy_inspector_egui * i can see my normal map inside StandardMaterial.

winter delta Apr 7, 2023, 4:41 PM

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Have you generated the vertex tangents?

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When you generate the icosphere mesh, call the icosphere.generate_tangents() method, then add it to the Assets<Mesh>.

tulip ginkgo Jan 20, 2024, 9:31 AM

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That was what I missed too. Is that documented somewhere @winter delta?

winter delta Jan 20, 2024, 9:47 AM

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@tulip ginkgo yeah, in StandardMaterial::normal_map_texture https://docs.rs/bevy/latest/bevy/pbr/struct.StandardMaterial.html#structfield.normal_map_texture

tulip ginkgo Jan 20, 2024, 10:14 AM

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And... for people not reading the docs like me? 😂 Ok my bad I read that one way too fast 🙄

winter delta Jan 20, 2024, 12:27 PM

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Yeah I wrote those line of doc after struggling with the same problem https://github.com/bevyengine/bevy/commit/4b1f6f4ebba92fc968124380d5a19e1d2500e2dd

the bevy pbr shader doesn't handle at all normal maps if a mesh doesn't have backed tangents. This is a pitfall (that I fell into) and needs to be documented.

#Normal map not working with point light