make glow gowier

Author: ThatCuteOne

overlay_1.21.6/assets/minecraft/shaders/core/entity.fsh

@@ -14,27 +14,38 @@ in vec2 texCoord0;
 
 out vec4 fragColor;
 
+// Customizable glow parameters
+const float GLOW_THRESHOLD = 0.3;
+const float GLOW_INTENSITY = 0.8;
+const float GLOW_BOOST = 0.6;  
+
 void main() {
-	vec2 texSize = textureSize(Sampler0, 0);
+    vec2 texSize = textureSize(Sampler0, 0);
     vec4 color = texture(Sampler0, texCoord0);
+    
 #ifdef ALPHA_CUTOUT
     if (color.a < ALPHA_CUTOUT) {
         discard;
     }
 #endif
-    vec4 NewoverlayColor = overlayColor;
-    if(dot(overlayColor.rgb - vec3(1,0,0),overlayColor.rgb - vec3(1,0,0)) <= 0.00001){
-        NewoverlayColor = vec4(163.0/255.0,1.0/255.0,160.0/255.0,1.0);
-    }
+    
     color *= vertexColor * ColorModulator;
+    
 #ifndef NO_OVERLAY
-    color.rgb = mix(NewoverlayColor.rgb, color.rgb, overlayColor.a);
-#endif
-#ifndef EMISSIVE
-	if (texSize.x == 2048 && mod(texSize.y, 1024) == 0) {
-	} else {
-		color *= lightMapColor;
-	}
+    color.rgb = mix(overlayColor.rgb, color.rgb, overlayColor.a);
 #endif
+    if (texSize.x == 2048 && mod(texSize.y, 1024) == 0) {
+        float brightness = dot(color.rgb, vec3(0.299, 0.587, 0.114));
+        float glowFactor = smoothstep(GLOW_THRESHOLD, 0.8, brightness);
+        
+        vec3 glow = color.rgb * GLOW_INTENSITY * glowFactor;
+        color.rgb += glow;
+        
+        color.rgb *= (1.0 + GLOW_BOOST * glowFactor);
+        color.rgb = min(color.rgb, vec3(2.0));
+    } else {
+        color *= lightMapColor;
+    }
+    
     fragColor = apply_fog(color, sphericalVertexDistance, cylindricalVertexDistance, FogEnvironmentalStart, FogEnvironmentalEnd, FogRenderDistanceStart, FogRenderDistanceEnd, FogColor);
-}
+}