There used to be an awesome website for FS Screenshot Artists and Painters of airplanes. Half was military, half was civilian. They were part tutorials, part forum, and part resources. They had fonts, showed how to do fabric over ribs paint effects, etc, etc, etc. I cant remember the name of that website, something like FSPainters.com or something. Many people were upset when it went offline, but I think someone put parts of it back online. Not sure where. Maybe someone here knows more about it.
As for 'settings' in FSX in Max/Blender/Gmax, that is a difficult call. The P3D SDK has some sample materials that are good for learning. That will put you on the right path. Also taking apart the materials for stock planes in FSX/P3D will show you their Alpha channels and things. You might end up asking people for settings for Materials as there are probably no existing 'lists' of settings for materials out there. (That might be a cool thing for someone with spare time and tons of knowledge to do, create a list of settings for materials for planes and scenery). There is a mesmerizing amount of settings that need to be done for a single material (that has the effects available in FSX). You can do basic textures with zero effects settings, but for proper materials with reflections and bump maps, etc, etc, etc, then you will need to setup your materials or have several of them (perhaps downloaded from someone) and have them in your Max/Blender/Gmax material library and just constantly reuse them.