2025-03-20 18:06:50 +08:00
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---
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title: ToonReflection
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date: 2025-03-20 17:04:16
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excerpt:
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tags:
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rating: ⭐
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---
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# 反射功能相关Pass
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2025-03-21 20:01:46 +08:00
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- ReflectionIndirect(None)
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- [[#ReflectionEnvironmentAndSky]]
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- DiffuseIndirectAndAO(Lumen/SSR)
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- LumenReflections
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- [[#DiffuseIndirectComposite]]
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## ReflectionEnvironmentAndSky
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2025-03-21 23:40:59 +08:00
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位于IndirectLightRendering.cpp的RenderDeferredReflectionsAndSkyLighting() => `AddSkyReflectionPass()`
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2025-03-21 20:01:46 +08:00
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2025-03-21 23:40:59 +08:00
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当`DiffuseIndirectMethod = EDiffuseIndirectMethod::Lumen`（也就是开启Lumen GI），如果反射方法为Lumen或者SSR则不会执行后续逻辑。
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不开启Lumen GI，反射方法为：
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- Lumen：`RenderLumenReflections()`
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- Rtx Reflection：`RenderRayTracingReflections()`
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- SSR：`ScreenSpaceRayTracing::RenderScreenSpaceReflections()`
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2025-03-23 21:51:19 +08:00
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`RenderDeferredReflectionsAndSkyLighting()`主要执行了：
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1. SkyLightDiffuse
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1. RenderDistanceFieldLighting()
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1. RenderDistanceFieldAOScreenGrid()：渲染距离场AO。
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2. RenderCapsuleShadowsForMovableSkylight()：渲染胶囊阴影。
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2. ReflectionIndirect
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- RenderLumenReflections()
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- RenderRayTracingReflections()
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- RenderScreenSpaceReflections()
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3. Denoise
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- Denoiser：IScreenSpaceDenoiser::DenoiseReflections()
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- TemporalFilter：AddTemporalAAPass()
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4. RenderDeferredPlanarReflections()：合成平面反射结果。
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5. AddSkyReflectionPass()
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2025-03-21 23:40:59 +08:00
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执行完上述反射方法后，最后执行`AddSkyReflectionPass()`
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2025-03-21 20:01:46 +08:00
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## DiffuseIndirectComposite
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位于IndirectLightRendering.cpp的`RenderDiffuseIndirectAndAmbientOcclusion()`
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