I wanted to comment on the use of the metallic reflective quality of surfaces of some of the addons I've been seeing.
I trust that this isn't off-topic in the "Addons & Mods: Discussion" forum?
You SHOULD NOT use that effect on camo'd vehicles that are probably painted with a FLAT paint. ***One of the objects of painting a vehicle with FLAT paint in a camo scheme is to reduce the shine and silhouette of the vehicle. ***If it has a metallic reflection, it then provides the inverse of a silhouette, a bright outline, to its surfaces. ***This makes it stand out while surrounded by natural vegetation and landscape.
You also SHOULD NOT use that effect on textures that are meant to circumvent actually modelling the surfaces depicted in the textures. ***For example, if "spokes" in a BMP's wheels are created using a texture, these spokes will practically disappear when the surface produces a high metallic shine across the whole surface in a setting or rising sun. ***The result will be a wheel that has almost no 3-D quality to it.
(Bump-mapping seems to provide a way to give a 3-D quality to textures in those kind of lighting conditions.)
The object of camo is to look more natural and less man-made (even men are "man-made"). ***If you add a metallic reflection to models that are trying to be camo'd, you're undoing the whole process of camo'ing the vehicle.
If you add a metallic reflection to surfaces that have a 3-D texture, all 3-Dness of the texture will practically disappear in the reflection of light given off by the metallic surface.
And for your info, even the green paint job on an A-10 Warthog is there for camo. ***That bird isn't meant to shine.
Air Force and Navy birds can afford to shine because they are usually stationed well away from the enemy's reach while they are parked on the ground and because they usually own the skies while they are up in the air.
The A-10, OV-10 Bronco, and birds like these make an attempt to be camo'd. ***I can only assume that it is because these birds operate closer to the front lines and at lower altitudes.
Army helos all have "subdued" (i.e., non-reflective camo) paint jobs.
Blued metallic parts on firearms normally have somewhat of a faint metallic shine to their finishes and some black plastics.