Glad everyone is enjoying our work. It was very nice of Akemi to allow us to modify his original model, and we are extremely grateful to him for this.
One quick note about the "oily" fuel tank. The 190A was notorious for leaking oil onto the drop tank. If you look closely at photographs, this was a quite frequent occurrence. To simulate this, I took the original droptank model, copied it, and expanded the copy so that it was SLIGHTLY larger than the original, I then increased the specularity (shininess) of the copied part, and added an alpha-channel (transparent) texture. This second texture is fairly simple, the texture itself is a dark brown-black, and I use the alpha properties to decide where the "oil" shows up, and where it does not, creating a dribble pattern to simulate the oil drizzled over the tank, the higher specularity giving it is sheen in the light. Again, i should only be SLIGHTLY closer to the viewer than the underlying part, or it just starts to look weird.
By the by, this also works to create bare metal in CFS2, so that a wing, for instance, will have the high shine of metal, but the seams and other details do not, so that when "sunlight" is reflected off the surface, these details are not lost. I've used it with some success to simulate the bare metal undersurfaces of late-war Luftwaffe aircraft......
Paul