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Code Issues 151 Wiki Activity

Switch the fog over the sky to the fog without the clouds as soon as the volume holds any cloud

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Hirek
2026-10-17 19:31:45 +02:00
parent 56889679d9
commit df48637718
1 changed files with 6 additions and 3 deletions
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9
shaders/fog_volume.glsl
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@@ -54,8 +54,11 @@ vec4 fog_along_view(vec3 view, vec2 fragcoord)
return vec4(volume.rgb + volume.a * rest.rgb, volume.a * rest.a);
}
// how fast the fog of the volume over the sky gives way to the fog without the clouds, per share of the light the clouds in it hold back
const float FOG_SKY_CLOUD_CUT = 4.0;
// shares of the light the clouds in the volume hold back between which its fog over the sky gives way to the fog without the clouds.
// low: the clouds of the volume (without the detail, so a little wider than those drawn) leave no light rim along their thin edges;
// the lower end above what the cells of the volume and the fog along the ray differ by on their own
const float FOG_SKY_CLOUD_LOW = 0.004;
const float FOG_SKY_CLOUD_HIGH = 0.03;
// fog in front of the sky in a view space direction: through the fog volume to its far end, then along the ray without the
// haze the atmosphere draws already. the far fog of the volume and the fog over the sky behind it are the same then
@@ -75,7 +78,7 @@ vec4 fog_sky(vec3 viewdirection, vec2 fragcoord)
if (weather_camera.z > 0.5)
{
vec4 clear = fog_analytic(direction, 0.0, far, false);
float clouds = clamp((1.0 - volume.a / max(clear.a, 1e-4)) * FOG_SKY_CLOUD_CUT, 0.0, 1.0);
float clouds = smoothstep(FOG_SKY_CLOUD_LOW, FOG_SKY_CLOUD_HIGH, 1.0 - volume.a / max(clear.a, 1e-4));
volume = mix(volume, clear, clouds);
}
vec4 rest = fog_analytic(direction, far, 200000.0, true);