There's one thing for certain, I have a new respect for texture makers, not that I had no respect before you understand, but at first glance it's just a picture, errrr with many, many layers Mahoney, to all intents and purposes that "simple" texture map is going to make or break your model. I've decided to go the "hand made" route for my texture map, pretty much because I haven't the technical knowledge to create all my own procedurals from scratch, however the option of a good selection of mat zones then gives the end user plenty of scope to use more complex shaders should they wish. I also discovered the "fun", hours of joy?, that getting a Good UV  map entails, closely followed by weeks of texture shopping, rebuilds, remaps,reshop, re render, rebuild, remap ad infinitum...Lets do it again   LOL