3dsmax 7, and why render it? its a WIP... not a picture that is supposed to be pretty, a viewport grab shows much more details than a render with backface cull and wireframe.
HEK comes with some cannon textures. there in the sp level folders and the level folders under the text folder in your main data folder (hope you understood that) theres about 4 different 1s to choose from. lookin good btw.