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Improved nether fog. more gameplay friendly and consistent look

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Xonk
2023-07-26 22:03:04 -04:00
parent dd03edd2de
commit 2ea9736c01
3 changed files with 27 additions and 25 deletions
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45
shaders/lib/nether_fog.glsl
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@ -13,27 +13,27 @@ float densityAtPosFog(in vec3 pos){
}
float cloudVol(in vec3 pos){
float Output = 0.0;
vec3 samplePos = pos*vec3(1.0,1./48.,1.0);
float finalfog = exp(max(100-pos.y,0.0) / -15) ;
float Wind = pow(max(pos.y-30,0.0) / 15.0,2.1);
float floorfog = pow(exp(max(pos.y-30,0.0) / -3.0),2);
float Plumes = texture2D(noisetex, (samplePos.xz + Wind)/256.0).b;
float floorPlumes = clamp(0.3 - exp(Plumes * -6),0,1);
Plumes *= Plumes;
float Erosion = densityAtPosFog(samplePos * 400 - frameTimeCounter*10 - Wind*10) *0.7+0.3 ;
float wind = pow(max(pos.y - 30,0.0) / 15.0,2.1);
// float maxdist = clamp((12 * 8) - length(pos - cameraPosition),0.0,1.0);
float noise_1 = pow(1-texture2D(noisetex, samplePos.xz/256.0 + wind/200).b,2.0);
float noise_2 = pow(densityAtPosFog(samplePos*256 - frameTimeCounter*10 + wind*10),1) * 0.75 +0.25;
float RoofToFloorDensityFalloff = exp(max(100-pos.y,0.0) / -15);
float FloorDensityFalloff = pow(exp(max(pos.y-31,0.0) / -3.0),2);
float RoofDensityFalloff = exp(max(120-pos.y,0.0) / -10);
float rooffog = exp(max(100-pos.y,0.0) / -5);
float maxdist = clamp((12 * 8) - length(pos - cameraPosition),0.0,1.0);
finalfog = max((finalfog - noise_1*noise_2 - rooffog) * maxdist, max(floorfog - noise_2*0.2,0.0)) ;
Output = max((RoofToFloorDensityFalloff - Plumes * (1.0-Erosion)) * 2.0, clamp((FloorDensityFalloff - floorPlumes*0.5) * Erosion ,0.0,1.0) );
return finalfog;
return Output;
}
vec4 GetVolumetricFog(
@ -72,23 +72,24 @@ vec4 GetVolumetricFog(
float dd = pow(expFactor, float(i+dither)/float(SAMPLES)) * log(expFactor) / float(SAMPLES)/(expFactor-1.0);
vec3 progress = start.xyz + d*dV;
vec3 progressW = gbufferModelViewInverse[3].xyz+cameraPosition + d*dVWorld;
float Density = cloudVol(progressW);
Density *= exp(max(progressW.y-80,0.0) / -5);
// do main lighting
float Density = cloudVol(progressW) * pow(exp(max(progressW.y-65,0.0) / -15),2);
float fireLight = cloudVol(progressW - vec3(0,1,0));
vec3 vL0 = vec3(1.0,0.5,0.2) * exp(fireLight * -25) * exp(max(progressW.y-30,0.0) / -10) * 25;
vL0 += vec3(0.8,0.8,1.0) * (1.0 - exp(Density * -1)) / 10 ;
// do background fog lighting
float Air = 0.01;
// vec3 vL0 = vec3(TORCH_R,TORCH_G,TORCH_B) * exp(max(progressW.y-30,0.0) / -10.0);
vec3 vL0 = vec3(TORCH_R,TORCH_G,TORCH_B) * exp(Density * -50) * exp(max(progressW.y-30,0.0) / -10.0)*25 ;
vL0 += (vec3(0.5,0.5,1.0)/ 5) * exp(max(100-progressW.y,0.0) / -15.0) * (1.0 - exp(Density * -1));
vec3 vL1 = fogcolor / 20.0;
vL += (vL0 - vL0*exp(-Density*dd*dL)) * absorbance;
vL += (vL1 - vL1*exp(-Air*dd*dL)) * absorbance;
absorbance *= exp(-(Density+Air)*dd*dL);
if (absorbance < 1e-5) break;
}
return vec4(vL,absorbance);
}