Where are the Archicad Surface controls documentation?

[4hotshoes]

There are several controls for each Surface: Transparency, (transmittance, attenuation) emission, reflection (ambient, diffuse, shininess), specular and corresponding alpha channels under textures. I find nothing in GS material that explains how these work. I mostly know how to get by in adjusting these settings, but is there other documentation that explains? I may have missed GS documents, but it seems odd if there is no mention of these anywhere. 

[Erwin Edel]

I'm currently working in AC23 project, but I'm sure nothing changed going forward for this:

https://help.Graphisoft.com/AC/23/INT/index.htm?rhcsh=1&rhnewwnd=0#t=_AC23_Help%2F130_UserInterfaceD...