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# Objective Bevy's default bias values for directional and spot lights currently cause significant artifacts. We should fix that so shadows look good by default! This is a less controversial/invasive alternative to #10188, which might enable us to keep the default bias value low, but also has its own sets of concerns and caveats that make it a risky choice for Bevy 0.12. ## Solution Bump the default normal bias from `0.6` to `1.8`. There is precedent for values in this general area as Godot has a default normal bias of `2.0`. ### Before ![image](https://github.com/superdump/bevy/assets/2694663/a5828011-33fc-4427-90ed-f093d7389053) ### After ![image](https://github.com/bevyengine/bevy/assets/2694663/0f2b16b0-c116-41ab-9886-1ace9e00efd6) ## Migration Guide The default `shadow_normal_bias` value for `DirectionalLight` and `SpotLight` has changed to accommodate artifacts introduced with the new shadow PCF changes. It is unlikely (especially given the new PCF shadow behaviors with these values), but you might need to manually tweak this value if your scene requires a lower bias and it relied on the previous default value. |
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