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Fix issue with shadow mask and area lights #3019

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Merged
merged 3 commits into from
Jan 8, 2021
Merged

Fix issue with shadow mask and area lights #3019

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98ac2c9
Not checking NdotL since it's not really valid for area lights (We ha…
FrancescoC-unity Jan 7, 2021
79196b5
Changelog
FrancescoC-unity Jan 7, 2021
9241433
Merge branch 'hd/bugfix' into HDRP/fix-shadowmask-with-area-light
sebastienlagarde Jan 8, 2021
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1 change: 1 addition & 0 deletions com.unity.render-pipelines.high-definition/CHANGELOG.md
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Expand Up @@ -34,6 +34,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
- Fixed Clearcoat on Stacklit or Lit breaks when URP is imported into the project (case 1297806)
- Fixed timing issues with accumulation motion blur
- Fixed an issue with the frame count management for the volumetric fog (case 1299251).
- Fixed issue with shadow mask and area lights.

### Changed
- Removed the material pass probe volumes evaluation mode.
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3 changes: 1 addition & 2 deletions com.unity.render-pipelines.high-definition/Runtime/Lighting/LightEvaluation.hlsl
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Expand Up @@ -481,12 +481,11 @@ SHADOW_TYPE EvaluateShadow_RectArea( LightLoopContext lightLoopContext, Position
#ifndef LIGHT_EVALUATION_NO_SHADOWS
float shadow = 1.0;
float shadowMask = 1.0;
float NdotL = dot(N, L); // Disable contact shadow and shadow mask when facing away from light (i.e transmission)

#ifdef SHADOWS_SHADOWMASK
// shadowMaskSelector.x is -1 if there is no shadow mask
// Note that we override shadow value (in case we don't have any dynamic shadow)
shadow = shadowMask = (light.shadowMaskSelector.x >= 0.0 && NdotL > 0.0) ? dot(BUILTIN_DATA_SHADOW_MASK, light.shadowMaskSelector) : 1.0;
shadow = shadowMask = (light.shadowMaskSelector.x >= 0.0) ? dot(BUILTIN_DATA_SHADOW_MASK, light.shadowMaskSelector) : 1.0;
#endif

// When screen space shadows are not supported, this value is stripped out as it is a constant.
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