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Use correct reflectivity at normal incidence values for water (0.02) and land masses (standard dielectric material F0 of 0.04) during the fresnel calculations in the planet fragment shader.

master
AnotherCommander 2020-08-14 07:48:12 +02:00
parent 88e99d47dd
commit 57a355da25
1 changed files with 4 additions and 3 deletions
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7
Resources/Shaders/oolite-default-planet.fragment
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@ -324,9 +324,10 @@ void main()
vec3 fresnel = vec3(0.0);
#if USE_SPECULAR && OOSPECULAR_NEW_MODEL
// water has a reflectivity of 0.05 and the spec map represents water as values close to 1.0
// don't let reflectivity drop below 0.02
fresnel = FresnelSchlick(vec3(max(SPECULAR_FACTOR * 0.05, 0.02)), light1Vector, halfVector);
// water has a reflectivity of 0.02 and the spec map represents water as values close to 1.0
// land masses have standard dielectric material reflectivity (approx. 0.04). So we scale
// our 0.0 ... 1.0 input to 0.04 ... 0.02
fresnel = FresnelSchlick(vec3(0.04 - 0.02 * SPECULAR_FACTOR), light1Vector, halfVector);
#endif
// Specular light.