Better bias

assets/voxygen/shaders/clouds-frag.glsl

@@ -112,7 +112,7 @@ void main() {
         vec2 view_pos = vec2(atan2(dir_2d.x, dir_2d.y), z);
 
         vec3 cam_wpos = cam_pos.xyz + focus_off.xyz;
-        float rain_dist = 150.0;
+        float rain_dist = 250.0;
         for (int i = 0; i < 7; i ++) {
             float old_rain_dist = rain_dist;
             rain_dist *= 0.3;

assets/voxygen/shaders/include/rain_occlusion.glsl

@@ -16,7 +16,7 @@ uniform u_rain_occlusion {
 
 float rain_occlusion_at(in vec3 fragPos)
 {
-    float bias = 0.5;
+    float bias = -0.2;
     float diskRadius = 0.01;
     const vec3 sampleOffsetDirections[20] = vec3[]
     (
@@ -27,7 +27,7 @@ float rain_occlusion_at(in vec3 fragPos)
        vec3( 0,  1,  1), vec3( 0, -1,  1), vec3( 0, -1, -1), vec3( 0,  1, -1)
     );
 
-    vec4 rain_pos = occlusion_texture_mat * vec4(fragPos - vec3(0, 0, bias), 1.0);
+    vec4 rain_pos = occlusion_texture_mat * vec4(fragPos, 1.0) - vec4(0, 0, bias, 0);
 
     float visibility = textureProj(sampler2DShadow(t_directed_occlusion_maps, s_directed_occlusion_maps), rain_pos);