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| - ShadowProjectionPixelShader.usf/Main (画阴影到 Common.ush/LightAttenuationTexture 中) | |
| - SSSTransmission = ManualPCF(ShadowPosition.xy, Settings); （输出到 FadedSSSShadow） | |
| - OutColor = EncodeLightAttenuation(half4(FadedShadow, FadedSSSShadow, FadedShadow, FadedSSSShadow)) （最终输出） | |
| - BasePassPixelShader.usf/FPixelShaderInOut_MainPS (画基本物体的 pass) | |
| - 调用 MaterialTemplate.ush 提供的方法（材质蓝图会根据 MaterialTemplate.ush 填充对应的方法） | |
| GetMaterialBaseColor | |
| GetMaterialMetallic | |
| GetMaterialSpecular | |
| GetXXX... | |
| - ShadingModelsMaterial.ush/SetGBufferForShadingModel 输出到 DeferredShadingCommon.ush/FGBufferData 结构体中 | |
| - DeferredLightPixelShaders.usf/DeferredLightPixelMain | |
| - DeferredShadingCommon.ush/GetScreenSpaceData （获取 GBuffer） | |
| - GetGBufferData { | |
| float4 GBufferA = FramebufferFetchMRT(1); | |
| float4 GBufferB = FramebufferFetchMRT(2); | |
| float4 GBufferC = FramebufferFetchMRT(3); | |
| float4 GBufferD = FramebufferFetchMRT(4); | |
| return DecodeGBufferData(GBufferA, GBufferB, GBufferC, GBufferD, GBufferE, GBufferF, GBufferVelocity, CustomNativeDepth, CustomStencil, SceneDepth, bGetNormalizedNormal, CheckerFromSceneColorUV(UV)); | |
| } | |
| - GetPerPixelLightAttenuation (获取阴影贴图) | |
| - GetDynamicLighting | |
| - GetShadowTerms （用阴影贴图获取的数据计算阴影） | |
| - ShadingModels.ush/IntegrateBxDF（根据 shading model 调用对应的 BXDF） | |
| - SubsurfaceBxDF | |
| - OutColor += (Radiance * Attenuation) * OpaqueVisibility; |
PreExposure
PostProcessEyeAdaptation.cpp => FSceneViewState::UpdatePreExposure
以下设置使得：PreExposure = 1
DirectionalLightColor
MobileBasePassRendering.cpp => SetupMobileDirectionalLightUniformParameters
Params.DirectionalLightColor = Light->Proxy->GetColor() / PI;
rebuild reflection captures
UEditorEngine::BuildReflectionCaptures => ReadbackCaptureData
FScene::CaptureOrUploadReflectionCapture
Point Light Intensity
inspector 设置 intensity 为 3.14
unreal 单位为厘米:
creator 单位为米：
EditorFactories.cpp
UTextureExporterTGA::ExportBinary
Texture is RGBA16 and cannot be represented at such high bit depth in .tga. Color will be scaled to RGBA8.
IndirectLightRendering.cpp => SetupReflectionUniformParameters
CubeArrayTexture = Scene->ReflectionSceneData.CubemapArray.GetRenderTarget().ShaderResourceTexture
查找最近反射球
FScene::FindClosestReflectionCaptures(FVector Position, const FReflectionCaptureProxy* (&SortedByDistanceOUT)[FPrimitiveSceneInfo::MaxCachedReflectionCaptureProxies])
更新最近反射球
FPrimitiveSceneInfo::CacheReflectionCaptures
r.CompileShadersForDevelopment=0;
recompileshaders /Engine/Private/BasePassPixelShader.usfhttps://medium.com/@lordned/unreal-engine-4-rendering-part-5-shader-permutations-2b975e503dd4
打开材质移动某个节点，点击
应用