No,those are all texture maps, the good ol' fashioned way. About 1700 of them at the moment. (i'm using the medium res ones for these renders, and six point lights, till i get the windows sorted i'm not going to be able to light and tweak the maps).
I'm sticking pretty close to the real one (about the only thing i never put in was the kink in the original where they had problems linking the narthex to the nave, i thought it was an error in my scan, turns out it really is a little skew).
Used the elaine - brandenburg book for reference, very handy.
good luck on yours, it's also looking good, just don't make the error i did, try get your UVW's to behave from the start, it took me ages to unwrap this thing.
