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Optimize SSR a bit more

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This commit is contained in:
Wojciech Figat
2026-01-20 22:05:52 +01:00
parent cc5e4c19e1
commit d7458d81a5
6 changed files with 118 additions and 127 deletions
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Source/Shaders/Reflections.shader
+17
View File
@@ -7,10 +7,15 @@
#include "./Flax/MaterialCommon.hlsl"
#include "./Flax/ReflectionsCommon.hlsl"
// Enable/disable blurring SSR during sampling results and mixing with reflections buffer
#define SSR_MIX_BLUR (!defined(PLATFORM_ANDROID) && !defined(PLATFORM_IOS) && !defined(PLATFORM_SWITCH))
META_CB_BEGIN(0, Data)
EnvProbeData PData;
float4x4 WVP;
GBufferData GBuffer;
float2 SSRTexelSize;
float2 Dummy0;
META_CB_END
DECLARE_GBUFFERDATA_ACCESS(GBuffer)
@@ -18,6 +23,7 @@ DECLARE_GBUFFERDATA_ACCESS(GBuffer)
TextureCube Probe : register(t4);
Texture2D Reflections : register(t5);
Texture2D PreIntegratedGF : register(t6);
Texture2D SSR : register(t7);
// Vertex Shader for probe shape rendering
META_VS(true, FEATURE_LEVEL_ES2)
@@ -76,6 +82,17 @@ float4 PS_CombinePass(Quad_VS2PS input) : SV_Target0
// Sample reflections buffer
float3 reflections = SAMPLE_RT(Reflections, input.TexCoord).rgb;
// Blend with Screen Space Reflections
float4 ssr = SSR.SampleLevel(SamplerLinearClamp, input.TexCoord, 0);
#if SSR_MIX_BLUR
ssr += SSR.SampleLevel(SamplerLinearClamp, input.TexCoord + float2(0, SSRTexelSize.y), 0);
ssr += SSR.SampleLevel(SamplerLinearClamp, input.TexCoord - float2(0, SSRTexelSize.y), 0);
ssr += SSR.SampleLevel(SamplerLinearClamp, input.TexCoord + float2(SSRTexelSize.x, 0), 0);
ssr += SSR.SampleLevel(SamplerLinearClamp, input.TexCoord - float2(SSRTexelSize.x, 0), 0);
ssr *= (1.0f / 5.0f);
#endif
reflections = lerp(reflections, ssr.rgb, saturate(ssr.a));
// Calculate specular color
float3 specularColor = GetSpecularColor(gBuffer);
Source/Shaders/SSR.shader
-24
View File
@@ -14,9 +14,6 @@
// Enable/disable luminance filter to reduce reflections highlights
#define SSR_REDUCE_HIGHLIGHTS 1
// Enable/disable blurring SSR during sampling results and mixing with reflections buffer
#define SSR_MIX_BLUR (!defined(PLATFORM_ANDROID) && !defined(PLATFORM_IOS) && !defined(PLATFORM_SWITCH))
META_CB_BEGIN(0, Data)
GBufferData GBuffer;
float MaxColorMiplevel;
@@ -264,24 +261,3 @@ float4 PS_TemporalPass(Quad_VS2PS input) : SV_Target0
return current;
}
// Pixel Shader for screen space reflections rendering - mix pass
META_PS(true, FEATURE_LEVEL_ES2)
float4 PS_MixPass(Quad_VS2PS input) : SV_Target0
{
// Inputs:
// Texture0 - final SSR reflections buffer
float4 ssr = Texture0.SampleLevel(SamplerLinearClamp, input.TexCoord, 0);
#if SSR_MIX_BLUR
ssr += Texture0.SampleLevel(SamplerLinearClamp, input.TexCoord + float2(0, SSRtexelSize.y), 0);
ssr += Texture0.SampleLevel(SamplerLinearClamp, input.TexCoord - float2(0, SSRtexelSize.y), 0);
ssr += Texture0.SampleLevel(SamplerLinearClamp, input.TexCoord + float2(SSRtexelSize.x, 0), 0);
ssr += Texture0.SampleLevel(SamplerLinearClamp, input.TexCoord - float2(SSRtexelSize.x, 0), 0);
ssr *= (1.0f / 5.0f);
#endif
ssr.a = saturate(ssr.a);
return ssr;
}