diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl index bd0bdcd081..d189900627 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin.azsl @@ -10,12 +10,24 @@ * */ -#include #include "Skin_Common.azsli" + +// SRGs #include #include + +// Pass Output #include + +// Utility #include +#include // TODO: Remove this after OpacityMode is removed from LightingModel + +// Custom Surface & Lighting +#include + +// Decals +#include // ---------- Material Parameters ---------- @@ -54,6 +66,8 @@ option bool o_blendMask_isBound; #include "MaterialInputs/TransmissionInput.azsli" +// ---------- Vertex Shader ---------- + struct VSInput { // Base fields (required by the template azsli file)... @@ -90,8 +104,6 @@ struct VSOutput float4 m_blendMask : UV8; }; -#include // TODO: Remove this after OpacityMode is removed from LightingModel -#include #include VSOutput SkinVS(VSInput IN) @@ -132,6 +144,9 @@ VSOutput SkinVS(VSInput IN) return OUT; } + +// ---------- Pixel Shader ---------- + float3 ApplyBaseColorWrinkleMap(bool shouldApply, float3 baseColor, Texture2D map, sampler mapSampler, float2 uv, float factor) { if (shouldApply) @@ -178,6 +193,9 @@ PbrLightingOutput SkinPS_Common(VSOutput IN) PrepareGeneratedTangent(IN.m_normal, IN.m_worldPosition, isFrontFace, IN.m_uv, UvSetCount, tangents, bitangents, startIndex); } + Surface surface; + surface.position = IN.m_worldPosition; + // ------- Detail Layer Setup ------- // When the detail maps and the detail blend mask are on the same UV, they both use the transformed detail UVs because they are 'attached' to each other @@ -213,19 +231,18 @@ PbrLightingOutput SkinPS_Common(VSOutput IN) normalMapSample = ApplyNormalWrinkleMap(o_wrinkleLayers_normal_useTexture4, normalMapSample, MaterialSrg::m_wrinkle_normal_texture4, MaterialSrg::m_sampler, normalUv, MaterialSrg::m_flipNormalX, MaterialSrg::m_flipNormalY, IN.m_blendMask.a); } - float3 normalWS; if(o_detail_normal_useTexture) { float3 normalTS = GetTangentSpaceNormal(normalMapSample, uvMatrix, MaterialSrg::m_normalFactor); bool applyOverlay = true; - normalWS = ApplyNormalMapOverlayWS(applyOverlay, IN.m_normal, normalTS, tangents[MaterialSrg::m_normalMapUvIndex], bitangents[MaterialSrg::m_normalMapUvIndex], + surface.normal = ApplyNormalMapOverlayWS(applyOverlay, IN.m_normal, normalTS, tangents[MaterialSrg::m_normalMapUvIndex], bitangents[MaterialSrg::m_normalMapUvIndex], MaterialSrg::m_detail_normal_texture, MaterialSrg::m_sampler, IN.m_detailUv, MaterialSrg::m_detail_normal_flipX, MaterialSrg::m_detail_normal_flipY, detailLayerNormalFactor, tangents[MaterialSrg::m_detail_allMapsUvIndex], bitangents[MaterialSrg::m_detail_allMapsUvIndex], MaterialSrg::m_detailUvMatrix); } else { - normalWS = GetWorldSpaceNormal(normalMapSample, IN.m_normal, tangents[MaterialSrg::m_normalMapUvIndex], bitangents[MaterialSrg::m_normalMapUvIndex], + surface.normal = GetWorldSpaceNormal(normalMapSample, IN.m_normal, tangents[MaterialSrg::m_normalMapUvIndex], bitangents[MaterialSrg::m_normalMapUvIndex], uvMatrix, MaterialSrg::m_normalFactor); } @@ -266,17 +283,29 @@ PbrLightingOutput SkinPS_Common(VSOutput IN) baseColor = ApplyTextureOverlay(o_detail_baseColor_useTexture, baseColor, MaterialSrg::m_detail_baseColor_texture, MaterialSrg::m_sampler, IN.m_detailUv, detailLayerBaseColorFactor); - - // ------- Roughness ------- - - float2 roughnessUv = IN.m_uv[MaterialSrg::m_roughnessMapUvIndex]; - float roughness = GetRoughnessInput(MaterialSrg::m_roughnessMap, MaterialSrg::m_sampler, roughnessUv, MaterialSrg::m_roughnessFactor, - MaterialSrg::m_roughnessLowerBound, MaterialSrg::m_roughnessUpperBound, o_roughness_useTexture); + if(o_wrinkleLayers_enabled && o_wrinkleLayers_showBlendMaskValues && o_blendMask_isBound) + { + // Overlay debug colors to highlight the different blend weights coming from the vertex color stream. + if(o_wrinkleLayers_count > 0) { baseColor = lerp(baseColor, float3(1,0,0), IN.m_blendMask.r); } + if(o_wrinkleLayers_count > 1) { baseColor = lerp(baseColor, float3(0,1,0), IN.m_blendMask.g); } + if(o_wrinkleLayers_count > 2) { baseColor = lerp(baseColor, float3(0,0,1), IN.m_blendMask.b); } + if(o_wrinkleLayers_count > 3) { baseColor = lerp(baseColor, float3(1,1,1), IN.m_blendMask.a); } + } // ------- Specular ------- float2 specularUv = IN.m_uv[MaterialSrg::m_specularF0MapUvIndex]; - float specularF0Factor = GetSpecularInput(MaterialSrg::m_specularF0Map, MaterialSrg::m_sampler, specularUv, MaterialSrg::m_specularF0Factor, o_specularF0_useTexture); + float specularF0 = GetSpecularInput(MaterialSrg::m_specularF0Map, MaterialSrg::m_sampler, specularUv, MaterialSrg::m_specularF0Factor, o_specularF0_useTexture); + + surface.SetAlbedoAndSpecularF0(baseColor, specularF0); + + // ------- Roughness ------- + + float2 roughnessUv = IN.m_uv[MaterialSrg::m_roughnessMapUvIndex]; + surface.roughnessLinear = GetRoughnessInput(MaterialSrg::m_roughnessMap, MaterialSrg::m_sampler, roughnessUv, MaterialSrg::m_roughnessFactor, + MaterialSrg::m_roughnessLowerBound, MaterialSrg::m_roughnessUpperBound, o_roughness_useTexture); + + surface.CalculateRoughnessA(); // ------- Subsurface ------- @@ -287,30 +316,54 @@ PbrLightingOutput SkinPS_Common(VSOutput IN) float2 transmissionUv = IN.m_uv[MaterialSrg::m_transmissionThicknessMapUvIndex]; float4 transmissionTintThickness = GeTransmissionInput(MaterialSrg::m_transmissionThicknessMap, MaterialSrg::m_sampler, transmissionUv, MaterialSrg::m_transmissionTintThickness); + surface.transmission.tint = transmissionTintThickness.rgb; + surface.transmission.thickness = transmissionTintThickness.w; + surface.transmission.transmissionParams = MaterialSrg::m_transmissionParams; + + // ------- Anisotropy ------- + + if (o_enableAnisotropy) + { + const float anisotropyAngle = 0.0f; + const float anisotropyFactor = 0.0f; + surface.anisotropy.Init(surface.normal, tangents[0], bitangents[0], anisotropyAngle, anisotropyFactor, surface.roughnessA); + } + + // ------- Lighting Data ------- + + LightingData lightingData; + + // Light iterator + lightingData.tileIterator.Init(IN.m_position, PassSrg::m_lightListRemapped, PassSrg::m_tileLightData); + lightingData.Init(surface.position, surface.normal, surface.roughnessLinear); + + // Directional light shadow coordinates + lightingData.shadowCoords = IN.m_shadowCoords; + + // Diffuse and Specular response (used in IBL calculations) + lightingData.specularResponse = FresnelSchlickWithRoughness(lightingData.NdotV, surface.specularF0, surface.roughnessLinear); + lightingData.diffuseResponse = 1.0 - lightingData.specularResponse; + // ------- Lighting Calculation ------- - if(o_wrinkleLayers_enabled && o_wrinkleLayers_showBlendMaskValues && o_blendMask_isBound) - { - // Overlay debug colors to highlight the different blend weights coming from the vertex color stream. - if(o_wrinkleLayers_count > 0) { baseColor = lerp(baseColor, float3(1,0,0), IN.m_blendMask.r); } - if(o_wrinkleLayers_count > 1) { baseColor = lerp(baseColor, float3(0,1,0), IN.m_blendMask.g); } - if(o_wrinkleLayers_count > 2) { baseColor = lerp(baseColor, float3(0,0,1), IN.m_blendMask.b); } - if(o_wrinkleLayers_count > 3) { baseColor = lerp(baseColor, float3(1,1,1), IN.m_blendMask.a); } - } + surface.clearCoat.factor = 0.0; + surface.clearCoat.roughness = 0.0; + surface.clearCoat.normal = float3(0.0, 0.0, 0.0); - float metallic = 0; - float3 emissive = float3(0,0,0); - float occlusion = 1; - float2 anisotropy = float2(0,0); - float clearCoatFactor = 0.0; - float clearCoatRoughness = 0.0; - float3 clearCoatNormal = float3(0.0, 0.0, 0.0); - float alpha = 1; + // Apply Decals + ApplyDecals(lightingData.tileIterator, surface); - PbrLightingOutput lightingOutput = PbrLighting(IN, baseColor, metallic, roughness, specularF0Factor, - normalWS, tangents[0], bitangents[0], anisotropy, - emissive, occlusion, transmissionTintThickness, MaterialSrg::m_transmissionParams, clearCoatFactor, clearCoatRoughness, clearCoatNormal, alpha, o_opacity_mode); + // Apply Direct Lighting + ApplyDirectLighting(surface, lightingData); + + // Apply Image Based Lighting (IBL) + ApplyIBL(surface, lightingData); + + // Finalize Lighting + lightingData.FinalizeLighting(surface.transmission.tint); + + PbrLightingOutput lightingOutput = GetPbrLightingOutput(surface, lightingData); // ------- Preparing output ------- diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin_Common.azsli b/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin_Common.azsli index 9754698101..20bf7c1f2a 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin_Common.azsli +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/Skin_Common.azsli @@ -13,6 +13,7 @@ #pragma once #include +#include #include #include "MaterialInputs/BaseColorInput.azsli" diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli index 8de8e0c33f..47d75a1a9a 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/EnhancedLighting.azsli @@ -17,7 +17,7 @@ // Then include custom surface and lighting data types #include -#include +#include #include #include diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli index 8de8e0c33f..dcc0e21a07 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Lighting/SkinLighting.azsli @@ -17,7 +17,7 @@ // Then include custom surface and lighting data types #include -#include +#include #include #include @@ -98,12 +98,12 @@ struct PbrLightingOutput }; -PbrLightingOutput GetPbrLightingOutput(Surface surface, LightingData lightingData, float alpha) +PbrLightingOutput GetPbrLightingOutput(Surface surface, LightingData lightingData) { PbrLightingOutput lightingOutput; - lightingOutput.m_diffuseColor = float4(lightingData.diffuseLighting, alpha); - lightingOutput.m_specularColor = float4(lightingData.specularLighting, 1.0); + lightingOutput.m_diffuseColor = float4(lightingData.diffuseLighting, 1.0f); + lightingOutput.m_specularColor = float4(lightingData.specularLighting, 1.0f); // albedo, specularF0, roughness, and normals for later passes (specular IBL, Diffuse GI, SSR, AO, etc) lightingOutput.m_specularF0 = float4(surface.specularF0, surface.roughnessLinear); diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli index 9d4163c474..228ea4bb52 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/PBR/Surfaces/SkinSurface.azsli @@ -41,7 +41,7 @@ class Surface //: BasePbrSurfaceData void CalculateRoughnessA(); //! Sets albedo and specularF0 using metallic workflow - void SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0, float metallic); + void SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0); }; @@ -80,12 +80,9 @@ void Surface::CalculateRoughnessA() } } -void Surface::SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0, float metallic) +void Surface::SetAlbedoAndSpecularF0(float3 baseColor, float inSpecularF0) { - float3 dielectricSpecularF0 = MaxDielectricSpecularF0 * inSpecularF0; - - // Compute albedo and specularF0 based on metalness - albedo = lerp(baseColor, float3(0.0f, 0.0f, 0.0f), metallic); - specularF0 = lerp(dielectricSpecularF0, baseColor, metallic); + albedo = baseColor; + specularF0 = MaxDielectricSpecularF0 * inSpecularF0; }