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(TAA) use variance clip instead of neighborhood clamp

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Xonk
2026-07-12 18:31:17 -04:00
parent e5f76e1bde
commit 3f3fe54068
1 changed files with 34 additions and 21 deletions
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shaders/dimensions/composite5.fsh
+29 -16
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@@ -260,11 +260,12 @@ vec3 closestToCamera5taps_DH(vec2 texcoord, sampler2D depth, sampler2D dhDepth,
return dmin;
}
uniform bool windowResizeCheck;
uniform int frameCounter;
vec4 computeTAA(vec2 texcoord, bool hand){
vec2 jitter = taaJitter*texelSize*0.5;
vec2 adjTC = clamp(texcoord*RENDER_SCALE - texelSize*0.5, vec2(0.0), RENDER_SCALE- texelSize*1.5);
vec2 adjTC = clamp(texcoord*RENDER_SCALE - texelSize*0.5, vec2(0.0), RENDER_SCALE - texelSize*1.5);
vec2 adjTC_noJitter = adjTC + jitter;
// get previous frames position stuff for UV
@@ -291,9 +292,11 @@ vec4 computeTAA(vec2 texcoord, bool hand){
previousPosition.xy = texcoord + (hand ? vec2(0.0) : velocity);
float cameraMovement = length(velocity/texelSize);
// adjust clamping radius when motion is detected to reduce ghosting further without needing to change blend factor
#if NEIGHBORHOOD_CLAMP_RADIUS_MULT_DURING_MOVEMENT < 100
float clampRadius = mix(1.0, float(NEIGHBORHOOD_CLAMP_RADIUS_MULT_DURING_MOVEMENT)/100.0f, clamp(length(velocity/texelSize),0.0,1.0) );
float clampRadius = mix(1.0, float(NEIGHBORHOOD_CLAMP_RADIUS_MULT_DURING_MOVEMENT)/100.0f, clamp(cameraMovement,0.0,1.0) );
#else
float clampRadius = 1.0;
#endif
@@ -318,7 +321,7 @@ vec4 computeTAA(vec2 texcoord, bool hand){
vec3 colMin = texture(colortex6, adjTC).rgb;
#else
//Assuming the history color is a blend of the 3x3 neighborhood, we clamp the history to the min and max of each channel in the 3x3 neighborhood
vec3 col0 = currentFrame; // can use this because its the center sample.
vec3 col0 = texture(colortex3, adjTC_noJitter).rgb;
vec3 col1 = texture(colortex3, adjTC_noJitter + vec2( texelSize.x, texelSize.y)*clampRadius).rgb;
vec3 col2 = texture(colortex3, adjTC_noJitter + vec2( texelSize.x, -texelSize.y)*clampRadius).rgb;
vec3 col3 = texture(colortex3, adjTC_noJitter + vec2(-texelSize.x, -texelSize.y)*clampRadius).rgb;
@@ -328,11 +331,21 @@ vec4 computeTAA(vec2 texcoord, bool hand){
vec3 col7 = texture(colortex3, adjTC_noJitter + vec2(-texelSize.x, 0.0)*clampRadius).rgb;
vec3 col8 = texture(colortex3, adjTC_noJitter + vec2( texelSize.x, 0.0)*clampRadius).rgb;
vec3 colMax = max(col0,max(col1,max(col2,max(col3, max(col4, max(col5, max(col6, max(col7, col8))))))));
vec3 colMin = min(col0,min(col1,min(col2,min(col3, min(col4, min(col5, min(col6, min(col7, col8))))))));
// variance clip: https://developer.download.nvidia.com/gameworks/events/GDC2016/msalvi_temporal_supersampling.pdf
float tuner = 1.25;
vec3 momentsA = (col0+col1+col2+col3+col4+col5+col6+col7+col8)/9.0;
vec3 momentsB = (col0*col0+col1*col1+col2*col2+col3*col3+col4*col4+col5*col5+col6*col6+col7*col7+col8*col8)/9.0;
vec3 standardDev = max(sqrt(momentsB - momentsA*momentsA),0.0);
colMin = 0.5 * (colMin + min(col0,min(col5,min(col6,min(col7,col8)))));
colMax = 0.5 * (colMax + max(col0,max(col5,max(col6,max(col7,col8)))));
vec3 colMin = momentsA - tuner*standardDev;
vec3 colMax = momentsA + tuner*standardDev;
// colMax = max(col0,max(col1,max(col2,max(col3, max(col4, max(col5, max(col6, max(col7, col8))))))));
// colMin = min(col0,min(col1,min(col2,min(col3, min(col4, min(col5, min(col6, min(col7, col8))))))));
// colMin = 0.5 * (colMin + min(col0,min(col5,min(col6,min(col7,col8)))));
// colMax = 0.5 * (colMax + max(col0,max(col5,max(col6,max(col7,col8)))));
// return vec4(colMin,1.0);
// return vec4(colMax,1.0);
#endif
#if CRITICAL_DAMAGE_TAKEN_EFFECT_START > 0
@@ -340,18 +353,16 @@ vec4 computeTAA(vec2 texcoord, bool hand){
if(CriticalDamageTaken > 0.001) previousPosition.xy = mix(previousPosition.xy, texcoord, pow(CriticalDamageTaken,0.3));
#endif
vec3 frameHistory = max(FastCatmulRom(colortex5, previousPosition.xy, vec4(texelSize, 1.0/texelSize), 0.75).xyz,1e-7);
vec3 frameHistory = FastCatmulRom(colortex5, previousPosition.xy, vec4(texelSize, 1.0/texelSize), 0.75).xyz;
vec3 clampedframeHistory = clamp(frameHistory, colMin, colMax);
float blendingFactor = BLEND_FACTOR;
// reduce history usage if the camera moves to reduce artifacts in motion.
float cameraMovement = length(velocity/texelSize);
blendingFactor = clamp(cameraMovement, blendingFactor, BLEND_FACTOR_DURING_MOVEMENT);
#if NEIGHBORHOOD_CLAMP_RADIUS_MULT_DURING_MOVEMENT > 99
if(hand) blendingFactor = clamp(cameraMovement, blendingFactor, 1.0);
#endif
// #if NEIGHBORHOOD_CLAMP_RADIUS_MULT_DURING_MOVEMENT > 99
// if(hand) blendingFactor = clamp(cameraMovement, blendingFactor, 1.0);
// #endif
#if CRITICAL_DAMAGE_TAKEN_EFFECT_START > 0
if(CriticalDamageTaken > 0.001){
@@ -359,6 +370,7 @@ vec4 computeTAA(vec2 texcoord, bool hand){
blendingFactor *= 0.5;
}
#endif
////// Increases blending factor when far from AABB, reduces ghosting
blendingFactor = clamp(blendingFactor + luma(abs(clampedframeHistory - frameHistory)/clampedframeHistory),0.0,1.0);
@@ -383,9 +395,10 @@ vec4 computeTAA(vec2 texcoord, bool hand){
void main() {
/* RENDERTARGETS:5 */
#if TAA_MODE > 0
vec2 taauTC = clamp(texcoord*RENDER_SCALE, vec2(0.0), RENDER_SCALE - texelSize*2.0);
// vec2 taauTC = clamp(texcoord*RENDER_SCALE, vec2(0.0), RENDER_SCALE - texelSize*2.0) + taaJitter*texelSize*0.5;
vec2 taauTC = clamp(texcoord*RENDER_SCALE - texelSize*0.5, vec2(0.0), RENDER_SCALE - texelSize*1.5);
float dataUnpacked = decodeVec2(texelFetch(colortex1,ivec2(gl_FragCoord.xy*RENDER_SCALE),0).w).y;
float dataUnpacked = decodeVec2(texelFetch(colortex1,ivec2(gl_FragCoord.xy*RENDER_SCALE + taaJitter*0.5),0).w).y;
bool hand = abs(dataUnpacked-0.75) < 0.01 && texture(depthtex1,taauTC).x < 1.0;