I would call it layer mapping, though MDH had another word for it, something along the lines of parallax. If you were to make this for each texture in your pack, its not really possible, as these are meshes, not just a special type of texture. Its a simple trick with a mesh and a texture, and is all handplaced ingame, so you couldn't apply it to a texture pack. Its not the type of mapping that like how in Oblivion you can add normal maps, specular maps and parallax maps, its simply a mesh trick.
MDH came up with this technique after playing Shadows of Collosus and was trying to figure out a way to make grass with it. What he was doing, was he took a simple flat plane mesh, made a simple texture with dots on it, and the background of the texture was tranparent. He was placing them on top of each other to try and create a 3d effect. This didn't work out right as you get a whole lot of clipping when placing meshes so close to each other. So I took the mesh, and put several planes into one mesh to avoid the clipping. Then I took a brick texture, made it transparent between the bricks, and put them together and made a 3d brick.
The trick is simple, yet very effective. Just note that it all comes down to what you do with the texture. If you tried hard enough, you could make a solid rock with this by making each layer different, and adding a whole lot more layers closer together.
Its basically a 3d surfaces with no fps loss at all, and this one is only 4 planes per nif. This picture here, you would normally expect to see 6 polygons per brick, which in this case,
should add up to over 300polys. But this entire mesh has 4 polygons in total. I did a lighting trick with the alpha also to make it appear more 3d. This was all done in Nifskope.
3d Brick trickYou can download this example here:
V7_Layers.7zI've included 3 different nifs, the first with no lighting at all, so you can plainly see the layers. The other two show examples of different lighting per layer to get a 3d effect.
I wanted to use these to cover the ground in cities, but to do this you need a completely flat area for it to work. Though you could use it to cover buildings, like castle walls to make the bricks stick out.
Heres another pic showing stone cobbles in a citySo basically, unless you wanted to make a texture with transparency for each texture (it wouldnt work with ground textures), apply it to a nif and place each block ingame onto the surfaces of buildings etc, its not really possible. This technique however is still awesome, and can be used in many ways. Phijama used a similar method to create his lightsabers for example. Its all up to what you can figure to do using a flat plane and a texture.