New guy here and i have a couple of questions. When making a map does everything have to be "on the grid" ? Some games every brush have to have its points/vertices on a grid or it wont show up in game. Second, I will use a program which will save the map as a .DXF file, which i can then export to .obj. I noticed DXF files are trianglulated, should i untrianglulate or does CS use tri's? Third , i might give a go at making some character models, what size should the tex maps be, what is prefered? (512x512) saved as a png  file is correct?