Adjust fog calculation parameters in GLSL shaders

Removed division of fogStart by 0.65 and changed the mix factor from 0.825 to 0.75 in total_fog_value for improved fog behavior. These changes affect fog.glsl in sodium versions 1.21.6, 1.21.9, and 1.21.11.

Author: MrGlitchDogePE

sodium-1.21.11/assets/sodium/shaders/include/fog.glsl

@@ -3,7 +3,6 @@ const int FOG_SHAPE_CYLINDRICAL = 1;
 
 float linear_fog_value(float vertexDistance, float fogStart, float fogEnd) {
     fogEnd *= (30.5/30); // Adjust for better visual match to original beta fog
-    fogStart /= 0.65;
     if (vertexDistance <= fogStart) {
         return 0.0;
     } else if (vertexDistance >= fogEnd) {
@@ -15,7 +14,7 @@ float linear_fog_value(float vertexDistance, float fogStart, float fogEnd) {
 
 // beta like behavior fog
 float total_fog_value(float sphericalVertexDistance, float cylindricalVertexDistance, float environmentalStart, float environmantalEnd, float renderDistanceStart, float renderDistanceEnd) {
-    return mix(linear_fog_value(sphericalVertexDistance, environmentalStart, environmantalEnd), linear_fog_value(cylindricalVertexDistance, clamp(mix(renderDistanceStart, environmentalStart, 0.825), 0, 2048), renderDistanceEnd),
+    return mix(linear_fog_value(sphericalVertexDistance, environmentalStart, environmantalEnd), linear_fog_value(cylindricalVertexDistance, clamp(mix(renderDistanceStart, environmentalStart, 0.75), 0, 2048), renderDistanceEnd),
     clamp((floor(abs(environmantalEnd / 16) - 6)) + 1, 0, 1));
 }
 

sodium-1.21.6/assets/sodium/shaders/include/fog.glsl

@@ -3,7 +3,6 @@ const int FOG_SHAPE_CYLINDRICAL = 1;
 
 float linear_fog_value(float vertexDistance, float fogStart, float fogEnd) {
     fogEnd *= (30.5/30); // Adjust for better visual match to original beta fog
-    fogStart /= 0.65;
     if (vertexDistance <= fogStart) {
         return 0.0;
     } else if (vertexDistance >= fogEnd) {
@@ -15,7 +14,7 @@ float linear_fog_value(float vertexDistance, float fogStart, float fogEnd) {
 
 // beta like behavior fog
 float total_fog_value(float sphericalVertexDistance, float cylindricalVertexDistance, float environmentalStart, float environmantalEnd, float renderDistanceStart, float renderDistanceEnd) {
-    return mix(linear_fog_value(sphericalVertexDistance, environmentalStart, environmantalEnd), linear_fog_value(cylindricalVertexDistance, clamp(mix(renderDistanceStart, environmentalStart, 0.825), 0, 2048), renderDistanceEnd),
+    return mix(linear_fog_value(sphericalVertexDistance, environmentalStart, environmantalEnd), linear_fog_value(cylindricalVertexDistance, clamp(mix(renderDistanceStart, environmentalStart, 0.75), 0, 2048), renderDistanceEnd),
     clamp((floor(abs(environmantalEnd / 16) - 6)) + 1, 0, 1));
 }
 

sodium-1.21.9/assets/sodium/shaders/include/fog.glsl

@@ -3,7 +3,6 @@ const int FOG_SHAPE_CYLINDRICAL = 1;
 
 float linear_fog_value(float vertexDistance, float fogStart, float fogEnd) {
     fogEnd *= (30.5/30); // Adjust for better visual match to original beta fog
-    fogStart /= 0.65;
     if (vertexDistance <= fogStart) {
         return 0.0;
     } else if (vertexDistance >= fogEnd) {
@@ -15,7 +14,7 @@ float linear_fog_value(float vertexDistance, float fogStart, float fogEnd) {
 
 // beta like behavior fog
 float total_fog_value(float sphericalVertexDistance, float cylindricalVertexDistance, float environmentalStart, float environmantalEnd, float renderDistanceStart, float renderDistanceEnd) {
-    return mix(linear_fog_value(sphericalVertexDistance, environmentalStart, environmantalEnd), linear_fog_value(cylindricalVertexDistance, clamp(mix(renderDistanceStart, environmentalStart, 0.825), 0, 2048), renderDistanceEnd),
+    return mix(linear_fog_value(sphericalVertexDistance, environmentalStart, environmantalEnd), linear_fog_value(cylindricalVertexDistance, clamp(mix(renderDistanceStart, environmentalStart, 0.75), 0, 2048), renderDistanceEnd),
     clamp((floor(abs(environmantalEnd / 16) - 6)) + 1, 0, 1));
 }