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tweak some cloud lighting a bit. also tweak VL biome fog a little

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Xonk
2023-06-08 18:44:09 -04:00
parent cf56275230
commit 3cda692d97
7 changed files with 31 additions and 28 deletions
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18
shaders/lib/ROBOBO_sky.glsl
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@ -110,7 +110,7 @@ vec3 calculateAtmosphere(vec3 background, vec3 viewVector, vec3 upVector, vec3 s
vec3 increment = viewVector * stepSize;
vec3 position = viewVector * sd.x + viewPosition;
position += increment * (0.34*noise);
vec2 phaseSun = sky_phase(dot(viewVector, sunVector ), sky_mieg);
vec2 phaseSun = sky_phase(dot(viewVector, sunVector ), sky_mieg) ;
vec2 phaseMoon = sky_phase(dot(viewVector, moonVector), sky_mieg);
vec3 scatteringSun = vec3(0.0);
@ -128,19 +128,19 @@ vec3 calculateAtmosphere(vec3 background, vec3 viewVector, vec3 upVector, vec3 s
for (int i = 0; i < iSteps; ++i, position += increment) {
vec3 density = sky_density(length(position));
if (density.y > 1e35) break;
vec3 stepAirmass = density * stepSize;
vec3 stepOpticalDepth = sky_coefficientsAttenuation * stepAirmass;
vec3 stepAirmass = density * stepSize ;
vec3 stepOpticalDepth = sky_coefficientsAttenuation * stepAirmass ;
vec3 stepTransmittance = exp2(-stepOpticalDepth * rLOG2);
vec3 stepTransmittedFraction = clamp01((stepTransmittance - 1.0) / -stepOpticalDepth);
vec3 stepScatteringVisible = transmittance * stepTransmittedFraction;
vec3 stepTransmittance = exp2(-stepOpticalDepth * rLOG2) ;
vec3 stepTransmittedFraction = clamp01((stepTransmittance - 1.0) / -stepOpticalDepth) ;
vec3 stepScatteringVisible = transmittance * stepTransmittedFraction ;
scatteringSun += sky_coefficientsScattering * (stepAirmass.xy * phaseSun ) * stepScatteringVisible * sky_transmittance(position, sunVector*0.5+0.1, jSteps);
scatteringSun += sky_coefficientsScattering * (stepAirmass.xy * phaseSun ) * stepScatteringVisible * sky_transmittance(position, sunVector*0.5+0.1, jSteps) ;
scatteringMoon += sky_coefficientsScattering * (stepAirmass.xy * phaseMoon) * stepScatteringVisible * sky_transmittance(position, moonVector, jSteps);
// Nice way to fake multiple scattering.
scatteringAmbient += sky_coefficientsScattering * stepAirmass.xy * (stepScatteringVisible * low_sun);
scatteringAmbient += sky_coefficientsScattering * stepAirmass.xy * (stepScatteringVisible * low_sun );
transmittance *= stepTransmittance;
transmittance *= stepTransmittance ;
}
vec3 scattering = scatteringSun * sunColorBase + (scatteringAmbient) * background + scatteringMoon*moonColorBase ;