Use range-based fog instead of z-plane based.

client/shaders/nodes_shader/opengl_fragment.glsl

@@ -197,13 +197,13 @@ void main(void)
 #if MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT
 	float alpha = gl_Color.a;
 	if (fogDistance != 0.0) {
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		float d = max(0.0, min(length(eyeVec) / fogDistance * 1.5 - 0.6, 1.0));
 		alpha = mix(alpha, 0.0, d);
 	}
 	col = vec4(col.rgb, alpha);
 #else
 	if (fogDistance != 0.0) {
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		float d = max(0.0, min(length(eyeVec) / fogDistance * 1.5 - 0.6, 1.0));
 		col = mix(col, skyBgColor, d);
 	}
 	col = vec4(col.rgb, base.a);

client/shaders/water_surface_shader/opengl_fragment.glsl

@@ -153,13 +153,13 @@ vec4 base = texture2D(baseTexture, uv).rgba;
 #if MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE
 	float alpha = gl_Color.a;
 	if (fogDistance != 0.0) {
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		float d = max(0.0, min(length(eyeVec) / fogDistance * 1.5 - 0.6, 1.0));
 		alpha = mix(alpha, 0.0, d);
 	}
 	col = vec4(col.rgb, alpha);
 #else
 	if (fogDistance != 0.0) {
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		float d = max(0.0, min(length(eyeVec) / fogDistance * 1.5 - 0.6, 1.0));
 		col = mix(col, skyBgColor, d);
 	}
 	col = vec4(col.rgb, base.a);

client/shaders/wielded_shader/opengl_fragment.glsl

@@ -107,7 +107,7 @@ void main(void)
 	vec4 col = vec4(color.rgb, base.a);
 	col *= gl_Color;
 	if (fogDistance != 0.0) {
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		float d = max(0.0, min(length(eyeVec) / fogDistance * 1.5 - 0.6, 1.0));
 		col = mix(col, skyBgColor, d);
 	}
 	gl_FragColor = vec4(col.rgb, base.a);

src/game.cpp

@@ -4168,7 +4168,7 @@ void Game::updateFrame(ProfilerGraph *graph, RunStats *stats,
 				runData->fog_range * 1.0,
 				0.01,
 				false, // pixel fog
-				false // range fog
+				true // range fog
 		);
 	} else {
 		driver->setFog(