Patch_2

leenkx/Shaders/ssrefr_pass/ssrefr_pass.frag.glsl

@@ -64,21 +64,26 @@ vec4 rayCast(vec3 dir) {
 		ddepth = getDeltaDepth(hitCoord);
 		if (ddepth > 0.0) return binarySearch(dir);
 	}
-	return vec4(texCoord, 0.0, 1.0);
+	return vec4(texCoord, 0.0, 0.0);
 }
 
 void main() {
-    vec4 g0 = textureLod(gbuffer0, texCoord, 0.0);
-    float roughness = g0.z;
     vec4 gr = textureLod(gbuffer_refraction, texCoord, 0.0);
     float ior = gr.x;
-    float opac = 1.0 - gr.y;
-    float d = textureLod(gbufferD, texCoord, 0.0).r * 2.0 - 1.0;
-    if (d == 0.0 || d == 1.0 || opac == 1.0 || ior == 1.0) {
-        fragColor.rgb = textureLod(tex1, texCoord, 0.0).rgb;
-		fragColor.a = opac;
+    float transmittance = gr.y;
+    float surfaceDepth = gr.z;
+    float d = surfaceDepth * 2.0 - 1.0;
+    
+    vec4 sceneSample = textureLod(tex, texCoord, 0.0);
+    if (surfaceDepth == 0.0 || transmittance == 0.0 || ior == 1.0) {
+        vec3 background = textureLod(tex1, texCoord, 0.0).rgb;
+        fragColor.rgb = sceneSample.rgb + background * (1.0 - sceneSample.a);
+        fragColor.a = 1.0;
         return;
     }
+    
+    vec4 g0 = textureLod(gbuffer0, texCoord, 0.0);
+    float roughness = g0.z;
 	vec2 enc = g0.rg;
     vec3 n;
     n.z = 1.0 - abs(enc.x) - abs(enc.y);
@@ -87,24 +92,32 @@ void main() {
 
     vec3 viewNormal = V3 * n;
     vec3 viewPos = getPosView(viewRay, d, cameraProj);
-    vec3 refracted = refract(normalize(viewPos), viewNormal, 1.0 / ior);
+    vec3 incident = normalize(viewPos);
+    vec3 refracted = refract(incident, viewNormal, 1.0 / ior);
+    if (length(refracted) < 0.001) {
+        vec3 background = textureLod(tex1, texCoord, 0.0).rgb;
+        fragColor.rgb = sceneSample.rgb + background * (1.0 - sceneSample.a);
+        fragColor.a = 1.0;
+        return;
+    }
+    
     hitCoord = viewPos;
 
     vec3 dir = refracted * (1.0 - rand(texCoord) * ss_refractionJitter * roughness) * 2.0;
     vec4 coords = rayCast(dir);
-	vec2 deltaCoords = abs(vec2(0.5, 0.5) - coords.xy);
-	float screenEdgeFactor = clamp(1.0 - (deltaCoords.x + deltaCoords.y), 0.0, 1.0);
+
+	vec2 screenEdge = smoothstep(0.0, 0.1, coords.xy) * smoothstep(0.0, 0.1, 1.0 - coords.xy);
+	float screenEdgeFactor = screenEdge.x * screenEdge.y;
 	float refractivity = 1.0 - roughness;
-	float intensity = pow(refractivity, ss_refractionFalloffExp) * screenEdgeFactor * \
-						clamp(-refracted.z, 0.0, 1.0) * clamp((length(viewPos - hitCoord)), 0.0, 1.0) * coords.w;
+	
+	float intensity = pow(refractivity, ss_refractionFalloffExp) * screenEdgeFactor * coords.w;
 	intensity = clamp(intensity, 0.0, 1.0);
 
-	vec4 refractionCol = textureLod(tex1, coords.xy, 0.0).rgba;
-	refractionCol.a = opac;
-	//refractionCol *= intensity;
-	vec4 color = textureLod(tex, texCoord.xy, 0.0).rgba;
-	color.a = opac;
-
-	fragColor.rgba = mix(refractionCol, color, opac);
-	fragColor.a = opac;
+	vec3 refractedBackground = textureLod(tex1, coords.xy, 0.0).rgb;
+	vec3 straightBackground = textureLod(tex1, texCoord, 0.0).rgb;
+	
+	vec3 behindColor = mix(straightBackground, refractedBackground, intensity);
+	
+	fragColor.rgb = sceneSample.rgb + behindColor * (1.0 - sceneSample.a);
+	fragColor.a = 1.0;
 }

leenkx/Shaders/ssrefr_pass/ssrefr_pass.json

@@ -5,12 +5,9 @@
 			"depth_write": false,
 			"compare_mode": "always",
 			"cull_mode": "none",
-			"blend_source": "source_alpha",
-			"blend_destination": "inverse_source_alpha",
+			"blend_source": "blend_one",
+			"blend_destination": "blend_zero",
 			"blend_operation": "add",
-			"alpha_blend_source": "blend_one",
-			"alpha_blend_destination": "blend_one",
-			"alpha_blend_operation": "add",
 			"links": [
 				{
 					"name": "P",