A conceptual map, long time ago since that category has been called up.
It may be a conceptual map, but please just use lowercase symbols only for your map name. There's no reason it needs to be uppercased (and some Operating Systems are sensitive for it).
The custom textures doesn't need to be custom as you can alpha-blend the decal into the diffuse textures by using;
texture 0 "textures/default.png"
texture d "textures/dichotomy/decal01.png"
or by something like this (which looks more fancy);
setshaderparam "specscale" .4 .4 .4
setshaderparam "parallaxscale" .04 -.02
texture 0 "textures/yves_allaire/e8/e8_base1c.jpg"
texture n "textures/yves_allaire/e8/e8_base1_n.jpg"
texture s "textures/yves_allaire/e8/e8_base1.jpg"
texture z "textures/yves_allaire/e8/e8_base1_z.jpg"
texlayer 22 "textures/yves_allaire/e8/e8alphaspawn.png" 4 1 //texslot blendbrush blendmode blendscale
I'm not having time actually use an official texture, so you probably would need to download the textures right
here to see the result.
Nice concept though.