This shader creates a simulated marble texture on a surface. It uses two colors, one as the base material and one as the interspersed material. The interspersed material is put into the base material in strips that are distorted using noise() and turbulence().
ambient is a value between 0.0 and 1.0 which determines how much of the base color of a surface that is visible when it is not illuminated by any light source.
specular is a value between 0.0 and 1.0 which is the fraction of color specularly reflected.
c3 is the shininess of the surface where 0.0 is the most dull and 1.0 is the most shiny.
scale describes how much the texture coordinates should be scaled before applying the marble texture. The larger the scaling, the smaller the area of the marble texture associated with a given area of the surface. A large number results in a very fine pattern, a small number yields a coarse pattern.
basecolor is a list containing the red, green and blue values for the base material. Each being a number between 0.0 and 1.0.
stripcolor is a list containing the red, green and blue values for the interspersed material.
opacity describes the opacity of a surface. 0.0 means totally transparent, 1.0 means totally opaque. May be a list of red, green and blue opacity values or a single value to be used for all color channels. Optional, default is 1.0.