Quote - Where do you learn anything about lux-materials? I tried luxrender these days, but did not find any substantial documentation about luxrender's materials except some parameter names in the lux scene file description. Otherwise any documentation on the topic seems to be like "Click here in the luxblend-gui and then the right thing will magically happen...". Is there some place where the lux scene file is documented, do i need to read the source, or am i looking in the wrong place (ie. is the knowledge in the PBRT-book or somewhere else?).

That's the problem, the documentation is very poor and many times wrong, for example the parameter "index" do not exist in a glossy material, what exist is the "d" parameter that is something different from the refraction index.

So, unless they improve the documentation, the only way to know the materials is to experiment with them and discover how it are and the effect of its parameters.

Stupidity also evolves!