Alpha-over density compensation. Mirrors GLSL luxarDensityAlpha()
(glsl-lib.ts): 1 − (1 − a)^uDensityAlphaExp when the exponent exceeds 1
(a thinned normal node, exponent 1/keep), else a untouched. Only the
normal graphs call it, so every other graph's generated code is unchanged.
Alpha-over density compensation. Mirrors GLSL
luxarDensityAlpha()(glsl-lib.ts):1 − (1 − a)^uDensityAlphaExpwhen the exponent exceeds 1 (a thinnednormalnode, exponent1/keep), elseauntouched. Only thenormalgraphs call it, so every other graph's generated code is unchanged.