diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli index 678e8cf061..71e283291f 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/LightingModel.azsli @@ -79,6 +79,7 @@ void PbrVsHelper(in VSInput IN, inout VSOutput OUT, float3 worldPosition, bool s struct PbrLightingOutput { + // Note some of these use special encodings, which are identical to struct ForwardPassOutput float4 m_diffuseColor; float4 m_specularColor; float4 m_albedo; @@ -98,7 +99,7 @@ PbrLightingOutput PbrLighting( in VSOutput IN, float3 vtxBitangent, float2 anisotropy, // angle and factor float3 emissive, - float occlusion, + float diffuseAmbientOcclusion, float4 transmissionTintThickness, float4 transmissionParams, float clearCoatFactor, @@ -213,7 +214,7 @@ PbrLightingOutput PbrLighting( in VSOutput IN, } // Apply ambient occlusion to indirect diffuse - iblDiffuse *= occlusion; + iblDiffuse *= diffuseAmbientOcclusion; // Adjust IBL lighting by exposure. float iblExposureFactor = pow(2.0, SceneSrg::m_iblExposure); @@ -259,8 +260,7 @@ PbrLightingOutput PbrLighting( in VSOutput IN, // albedo, specularF0, roughness, and normals for later passes (specular IBL, Diffuse GI, SSR, AO, etc) lightingOutput.m_specularF0 = float4(specularF0, roughness); - lightingOutput.m_albedo.rgb = surface.albedo * diffuseResponse; - lightingOutput.m_albedo.a = occlusion; + lightingOutput.m_albedo.rgb = surface.albedo * diffuseResponse * diffuseAmbientOcclusion; lightingOutput.m_normal.rgb = EncodeNormalSignedOctahedron(normal); lightingOutput.m_normal.a = o_specularF0_enableMultiScatterCompensation ? 1.0f : 0.0f; diff --git a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite.azsl b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite.azsl index 9b4e703f89..b3b26c4d42 100644 --- a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite.azsl +++ b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite.azsl @@ -24,7 +24,7 @@ ShaderResourceGroup PassSrg : SRG_PerPass Texture2DMS m_downsampledProbeIrradiance; Texture2DMS m_downsampledDepth; Texture2DMS m_downsampledNormal; - Texture2DMS m_albedo; // RGB8 = Albedo, A = Occlusion + Texture2DMS m_albedo; // RGB8 = Albedo with pre-multiplied factors, A = Unused here Texture2DMS m_normal; // RGB10 = Normal (Encoded), A2 = Flags Texture2DMS m_depth; @@ -118,7 +118,7 @@ float3 SampleProbeIrradiance(uint sampleIndex, uint2 probeIrradianceCoords, floa } // retrieve irradiance from the global IBL diffuse cubemap -float3 SampleGlobalIBL(uint sampleIndex, uint2 screenCoords, float depth, float3 normal, float3 albedo) +float3 SampleGlobalIBL(uint sampleIndex, uint2 screenCoords, float depth, float3 normal) { uint2 dimensions; uint samples; @@ -160,23 +160,19 @@ PSOutput MainPS(VSOutput IN, in uint sampleIndex : SV_SampleIndex) float4 encodedNormal = PassSrg::m_normal.Load(screenCoords, sampleIndex); float3 normal = DecodeNormalSignedOctahedron(encodedNormal.rgb); float4 albedo = PassSrg::m_albedo.Load(screenCoords, sampleIndex); - float occlusion = albedo.a; float useProbeIrradiance = PassSrg::m_downsampledProbeIrradiance.Load(probeIrradianceCoords, sampleIndex).a; float3 diffuse = float3(0.0f, 0.0f, 0.0f); if (useProbeIrradiance > 0.0f) { float3 irradiance = SampleProbeIrradiance(sampleIndex, probeIrradianceCoords, depth, normal, albedo, ImageScale); - diffuse = (albedo.rgb / PI) * irradiance * occlusion; + diffuse = (albedo.rgb / PI) * irradiance; } else { - float3 irradiance = SampleGlobalIBL(sampleIndex, screenCoords, depth, normal, albedo); + float3 irradiance = SampleGlobalIBL(sampleIndex, screenCoords, depth, normal); diffuse = albedo * irradiance; - // apply ambient occlusion to indirect diffuse - diffuse *= occlusion; - // adjust IBL lighting by exposure. float iblExposureFactor = pow(2.0, SceneSrg::m_iblExposure); diffuse *= iblExposureFactor; diff --git a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite_nomsaa.azsl b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite_nomsaa.azsl index 74571b5c6a..a5d761d815 100644 --- a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite_nomsaa.azsl +++ b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseComposite_nomsaa.azsl @@ -27,7 +27,7 @@ ShaderResourceGroup PassSrg : SRG_PerPass Texture2D m_downsampledProbeIrradiance; Texture2D m_downsampledDepth; Texture2D m_downsampledNormal; - Texture2D m_albedo; // RGB8 = Albedo, A = Occlusion + Texture2D m_albedo; // RGB8 = Albedo with pre-multiplied factors, A = Unused here Texture2D m_normal; // RGB10 = Normal (Encoded), A2 = Flags Texture2D m_depth; @@ -121,7 +121,7 @@ float3 SampleProbeIrradiance(uint2 probeIrradianceCoords, float depth, float3 no } // retrieve irradiance from the global IBL diffuse cubemap -float3 SampleGlobalIBL(uint2 screenCoords, float depth, float3 normal, float3 albedo) +float3 SampleGlobalIBL(uint2 screenCoords, float depth, float3 normal) { uint2 dimensions; PassSrg::m_depth.GetDimensions(dimensions.x, dimensions.y); @@ -162,23 +162,19 @@ PSOutput MainPS(VSOutput IN) float4 encodedNormal = PassSrg::m_normal.Load(int3(screenCoords, 0)); float3 normal = DecodeNormalSignedOctahedron(encodedNormal.rgb); float4 albedo = PassSrg::m_albedo.Load(int3(screenCoords, 0)); - float occlusion = albedo.a; float useProbeIrradiance = PassSrg::m_downsampledProbeIrradiance.Load(int3(probeIrradianceCoords,0)).a; float3 diffuse = float3(0.0f, 0.0f, 0.0f); if (useProbeIrradiance > 0.0f) { float3 irradiance = SampleProbeIrradiance(probeIrradianceCoords, depth, normal, albedo, ImageScale); - diffuse = (albedo.rgb / PI) * irradiance * occlusion; + diffuse = (albedo.rgb / PI) * irradiance; } else { - float3 irradiance = SampleGlobalIBL(screenCoords, depth, normal, albedo); + float3 irradiance = SampleGlobalIBL(screenCoords, depth, normal); diffuse = albedo * irradiance; - // apply ambient occlusion to indirect diffuse - diffuse *= occlusion; - // adjust IBL lighting by exposure. float iblExposureFactor = pow(2.0, SceneSrg::m_iblExposure); diffuse *= iblExposureFactor; diff --git a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen.azsl b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen.azsl index d6a0de8159..dbc134d2ff 100644 --- a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen.azsl +++ b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen.azsl @@ -21,7 +21,7 @@ ShaderResourceGroup PassSrg : SRG_PerPass { - Texture2DMS m_albedo; // RGB8 = Albedo, A = Occlusion + Texture2DMS m_albedo; // RGB8 = Albedo with pre-multiplied factors, A = Unused here Texture2DMS m_normal; // RGB10 = Normal (Encoded), A2 = Flags Texture2DMS m_depth; } @@ -41,7 +41,7 @@ VSOutput MainVS(VSInput input) } // retrieve irradiance from the global IBL diffuse cubemap -float3 SampleGlobalIBL(uint sampleIndex, uint2 screenCoords, float depth, float3 normal, float3 albedo) +float3 SampleGlobalIBL(uint sampleIndex, uint2 screenCoords, float depth, float3 normal) { uint2 dimensions; uint samples; @@ -76,14 +76,10 @@ PSOutput MainPS(VSOutput IN, in uint sampleIndex : SV_SampleIndex) float4 encodedNormal = PassSrg::m_normal.Load(screenCoords, sampleIndex); float3 normal = DecodeNormalSignedOctahedron(encodedNormal.rgb); float4 albedo = PassSrg::m_albedo.Load(screenCoords, sampleIndex); - float occlusion = albedo.a; - float3 irradiance = SampleGlobalIBL(sampleIndex, screenCoords, depth, normal, albedo); + float3 irradiance = SampleGlobalIBL(sampleIndex, screenCoords, depth, normal); float3 diffuse = albedo * irradiance; - // apply ambient occlusion to indirect diffuse - diffuse *= occlusion; - // adjust IBL lighting by exposure. float iblExposureFactor = pow(2.0, SceneSrg::m_iblExposure); diffuse *= iblExposureFactor; diff --git a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen_nomsaa.azsl b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen_nomsaa.azsl index fe3523210a..803046efd4 100644 --- a/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen_nomsaa.azsl +++ b/Gems/Atom/Feature/Common/Assets/Shaders/DiffuseGlobalIllumination/DiffuseGlobalFullscreen_nomsaa.azsl @@ -24,7 +24,7 @@ ShaderResourceGroup PassSrg : SRG_PerPass { - Texture2D m_albedo; // RGB8 = Albedo, A = Occlusion + Texture2D m_albedo; // RGB8 = Albedo with pre-multiplied factors, A = Unused here Texture2D m_normal; // RGB10 = Normal (Encoded), A2 = Flags Texture2D m_depth; } @@ -44,7 +44,7 @@ VSOutput MainVS(VSInput input) } // retrieve irradiance from the global IBL diffuse cubemap -float3 SampleGlobalIBL(uint sampleIndex, uint2 screenCoords, float depth, float3 normal, float3 albedo) +float3 SampleGlobalIBL(uint sampleIndex, uint2 screenCoords, float depth, float3 normal) { uint2 dimensions; PassSrg::m_depth.GetDimensions(dimensions.x, dimensions.y); @@ -78,14 +78,10 @@ PSOutput MainPS(VSOutput IN, in uint sampleIndex : SV_SampleIndex) float4 encodedNormal = PassSrg::m_normal.Load(int3(screenCoords, 0)); float3 normal = DecodeNormalSignedOctahedron(encodedNormal.rgb); float4 albedo = PassSrg::m_albedo.Load(int3(screenCoords, 0)); - float occlusion = albedo.a; - float3 irradiance = SampleGlobalIBL(sampleIndex, screenCoords, depth, normal, albedo); + float3 irradiance = SampleGlobalIBL(sampleIndex, screenCoords, depth, normal); float3 diffuse = albedo * irradiance; - // apply ambient occlusion to indirect diffuse - diffuse *= occlusion; - // adjust IBL lighting by exposure. float iblExposureFactor = pow(2.0, SceneSrg::m_iblExposure); diffuse *= iblExposureFactor;