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Fix for NaN that can happen on area lights at a certain angle. #4081

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Merged
merged 4 commits into from
Apr 15, 2021
Merged

Fix for NaN that can happen on area lights at a certain angle. #4081

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280fe14
Fix NaN with V1oV2 == -1
FrancescoC-unity Apr 6, 2021
23a14b7
Changelog
FrancescoC-unity Apr 6, 2021
8c38840
Use clamping instead
FrancescoC-unity Apr 6, 2021
0cca9dd
Merge branch 'hd/bugfix' into HDRP/fix-NaN-in-area-light
sebastienlagarde Apr 15, 2021
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3 changes: 2 additions & 1 deletion com.unity.render-pipelines.core/ShaderLibrary/AreaLighting.hlsl
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Expand Up @@ -21,7 +21,8 @@ real3 ComputeEdgeFactor(real3 V1, real3 V2)
if (V1oV2 < 0)
{
// Undo range reduction.
y = PI * rsqrt(saturate(1 - V1oV2 * V1oV2)) - y;
const float epsilon = 1e-5f;
y = PI * (max(epsilon, saturate(1 - V1oV2 * V1oV2))) - y;
}

return V1xV2 * y;
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1 change: 1 addition & 0 deletions com.unity.render-pipelines.high-definition/CHANGELOG.md
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Expand Up @@ -146,6 +146,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
- Fixed issue with the color space of AOVs (case 1324759)
- Fixed issue with history buffers when using multiple AOVs (case 1323684).
- Fixed camera preview with multi selection (case 1324126).
- Fixed a NaN generating in Area light code.

### Changed
- Changed Window/Render Pipeline/HD Render Pipeline Wizard to Window/Rendering/HDRP Wizard
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