Improved cloud falloff mist, faster noise sampling

assets/voxygen/shaders/include/lod.glsl

@@ -12,7 +12,7 @@ vec2 splay(vec2 pos, float e) {
 }
 
 vec3 lod_pos(vec2 v_pos) {
-	vec2 hpos = focus_pos.xy + splay(v_pos, 3.0) * 20000.0;
+	vec2 hpos = focus_pos.xy + splay(v_pos, 4.0) * 100000.0;
 	return vec3(hpos, alt_at(hpos));
 }
 

assets/voxygen/shaders/include/sky.glsl

@@ -132,7 +132,7 @@ vec2 cloud_at(vec3 pos) {
 
 	float shade = ((pos.z - CLOUD_AVG_HEIGHT) / (CLOUD_AVG_HEIGHT - CLOUD_HEIGHT_MIN) + 0.5);
 
-	return vec2(shade, density / (1.0 + vsum(abs(pos - cam_pos.xyz)) / 5000));
+	return vec2(shade, density / (1.0 + vsum(abs(pos - cam_pos.xyz)) / 10000));
 }
 
 vec4 get_cloud_color(vec3 dir, vec3 origin, float time_of_day, float max_dist, float quality) {
@@ -143,7 +143,8 @@ vec4 get_cloud_color(vec3 dir, vec3 origin, float time_of_day, float max_dist, f
 	float maxd = (CLOUD_HEIGHT_MAX - origin.z) / dir.z;
 
 	float start = max(min(mind, maxd), 0.0);
-	float delta = min(abs(mind - maxd), max_dist);
+	float cloud_delta = abs(mind - maxd);
+	float delta = min(cloud_delta, max_dist);
 
 	bool do_cast = true;
 	if (mind < 0.0 && maxd < 0.0) {
@@ -170,7 +171,7 @@ vec4 get_cloud_color(vec3 dir, vec3 origin, float time_of_day, float max_dist, f
 		}
 	}
 
-	float total_density = 1.0 - passthrough;// / (1.0 + max(max_dist, start) * 0.0001);
+	float total_density = 1.0 - passthrough / (1.0 + (max_dist / (1.0 + max(abs(dir.z), 0.03) * 100.0)) * 0.00003);
 
 	total_density = max(total_density - 1.0 / pow(max_dist, 0.25), 0.0); // Hack
 
@@ -267,7 +268,7 @@ vec3 get_sky_color(vec3 dir, float time_of_day, vec3 origin, vec3 f_pos, float q
 }
 
 float fog(vec3 f_pos, vec3 focus_pos, uint medium) {
-	return max(1.0 - 10000.0 / (1.0 + distance(f_pos.xy, focus_pos.xy)), 0.0);
+	return max(1.0 - 5000.0 / (1.0 + distance(f_pos.xy, focus_pos.xy)), 0.0);
 
 	float fog_radius = view_distance.x;
 	float mist_radius = 10000000.0;

assets/voxygen/shaders/lod-terrain-frag.glsl

@@ -23,7 +23,7 @@ void main() {
 	float fog_level = fog(f_pos.xyz, focus_pos.xyz, medium.x);
 	vec4 clouds;
 	vec3 fog_color = get_sky_color(normalize(f_pos - cam_pos.xyz), time_of_day.x, cam_pos.xyz, f_pos, 1.0, true, clouds);
-	vec3 color = mix(mix(surf_color, vec3(1), fog_level), clouds.rgb, clouds.a);
+	vec3 color = mix(mix(surf_color, fog_color, fog_level), clouds.rgb, clouds.a);
 
 	tgt_color = vec4(color, 1.0);
 }

assets/voxygen/shaders/terrain-frag.glsl

@@ -36,7 +36,7 @@ void main() {
 	float fog_level = fog(f_pos.xyz, focus_pos.xyz, medium.x);
 	vec4 clouds;
 	vec3 fog_color = get_sky_color(normalize(f_pos - cam_pos.xyz), time_of_day.x, cam_pos.xyz, f_pos, 1.0, true, clouds);
-	vec3 color = mix(mix(surf_color, vec3(1), fog_level), clouds.rgb, clouds.a);
+	vec3 color = mix(mix(surf_color, fog_color, fog_level), clouds.rgb, clouds.a);
 
 	tgt_color = vec4(color, 1.0);
 }

voxygen/src/render/renderer.rs

@@ -124,7 +124,7 @@ impl Renderer {
         let noise_tex = Texture::new(
             &mut factory,
             &assets::load_expect("voxygen.texture.noise"),
-            Some(gfx::texture::FilterMethod::Trilinear),
+            Some(gfx::texture::FilterMethod::Bilinear),
             Some(gfx::texture::WrapMode::Tile),
         )?;
 

voxygen/src/scene/terrain.rs

@@ -1240,7 +1240,7 @@ impl<V: RectRasterableVol> Terrain<V> {
             // a sample of the terrain that includes both the chunk we want and
             // its neighbours.
             let volume = match client.state().terrain().sample(aabr) {
-                Ok(sample) => sample,
+                Ok(sample) => sample, // TODO: Ensure that all of the chunk's neighbours still exist to avoid buggy shadow borders
                 // Either this chunk or its neighbours doesn't yet exist, so we keep it in the
                 // queue to be processed at a later date when we have its neighbours.
                 Err(VolGrid2dError::NoSuchChunk) => return,