Until recently I have not messed with the specular.

So I went over to FSdeveloper for a bit of research pertaining to them. I did not find my answer. However, I'm sure the answer is there if I dig enough. Which I'll do if necessary.

I'm hopeful someone will pop in here. Maybe explain colors/saturation, principals, the effect it/they have in relation to the spec map itself. What key areas/colors benefit most to enhance depth to pull out form and details best.

Mind you, I've been playing around doing my own thing with different ideas in Photoshop. for positive results.