PT: fixed shadow ray offsetting (regression)

dzhdanNV · dzhdanNV · commit 6566c00c61d0 · 2026-01-02T15:57:54.000+08:00
diff --git a/Shaders/Include/RaytracingShared.hlsli b/Shaders/Include/RaytracingShared.hlsli
@@ -648,8 +648,9 @@ float3 GetLighting( GeometryProps geometryProps, MaterialProps materialProps, ui
 
         float3 sunDirection = normalize( gSunBasisX.xyz * rnd.x + gSunBasisY.xyz * rnd.y + gSunDirection.xyz );
         float2 mipAndCone = GetConeAngleFromAngularRadius( geometryProps.mip, gTanSunAngularRadius );
+        float3 Xoffset = geometryProps.GetXoffset( sunDirection, PT_SHADOW_RAY_OFFSET );
 
-        float hitT = CastVisibilityRay_AnyHit( Xshadow, sunDirection, 0.0, INF, mipAndCone, gWorldTlas, instanceInclusionMask, rayFlags );
+        float hitT = CastVisibilityRay_AnyHit( Xoffset, sunDirection, 0.0, INF, mipAndCone, gWorldTlas, instanceInclusionMask, rayFlags );
         lighting *= float( hitT == INF );
     }
 #endif

Original file line number	Diff line number	Diff line change
`@@ -648,8 +648,9 @@ float3 GetLighting( GeometryProps geometryProps, MaterialProps materialProps, ui`
`648`	`648`
`649`	`649`	`float3 sunDirection = normalize( gSunBasisX.xyz * rnd.x + gSunBasisY.xyz * rnd.y + gSunDirection.xyz );`
`650`	`650`	`float2 mipAndCone = GetConeAngleFromAngularRadius( geometryProps.mip, gTanSunAngularRadius );`
	`651`	`+ float3 Xoffset = geometryProps.GetXoffset( sunDirection, PT_SHADOW_RAY_OFFSET );`
`651`	`652`
`652`		`- float hitT = CastVisibilityRay_AnyHit( Xshadow, sunDirection, 0.0, INF, mipAndCone, gWorldTlas, instanceInclusionMask, rayFlags );`
	`653`	`+ float hitT = CastVisibilityRay_AnyHit( Xoffset, sunDirection, 0.0, INF, mipAndCone, gWorldTlas, instanceInclusionMask, rayFlags );`
`653`	`654`	`lighting *= float( hitT == INF );`
`654`	`655`	`}`
`655`	`656`	`#endif`