Quote: "_S = SPECULAR = ???"
Specularity is the quantity used in 3D rendering which represents the amount of specular reflectivity a surface has. It is a key component in determining the brightness of specular highlights, along with shininess to determine the size of the highlights.
It is frequently used in real-time computer graphics where the mirror-like specular reflection of light from other surfaces is often ignored (due to the more intensive computations required to calculate this), and the specular reflection of light direct from point light sources is modelled as specular highlight
Quote: "_N = NORMAL = ???"
Normal mapping, or "Dot3 bump mapping", is a technique used for bump mapping. It is used to add details without using more polygons. A normal map is usually an RGB image that corresponds to the X, Y, and Z coordinates of a surface normal from a more detailed version of the object. A common use of this technique is to greatly enhance the appearance and details of a low polygon model by generating a normal map from a high polygon model.
Also FPSC doesnt need your "AUV" maps, the UV is made and wrapped onto the model...
Also theirs Parallax maps,
Quote: "
Parallax mapping (also called offset mapping or virtual displacement mapping) is an enhancement of the bump mapping or normal mapping techniques applied to textures in 3D rendering applications such as video games. To the end user, this means that textures such as stone walls will have more apparent depth and thus greater realism with less of an influence on the performance of the simulation. Parallax mapping was introduced by Tomomichi Kaneko et al. in 2001.
Parallax mapping is implemented by displacing the texture coordinates at a point on the rendered polygon by a function of the view angle in tangent space (the angle relative to the surface normal) and the value of the height map at that point. At steeper view-angles, the texture coordinates are displaced more, giving the illusion of depth due to parallax effects as the view changes.
Parallax mapping described by Kaneko is a single step process that does not account for occlusion. Subsequent enhancements have been made to the algorithm incorporating iterative approaches to allow for occlusion and accurate silhouette rendering."
TL ; DR? Then it's a Map that adds a much more 3D effect to a certain object that gives it a realistic feeling,
EG:
