I have just started work on the main body of the tank. There are detailed lines/grooves drawn on the tank in the cartoon and I have been wondering how best to do these. Should I model them or should i use a bump map when it comes to texturing. So far I have been using extrude face and then scaling them in to create grooves along every edge to create the pattern I want. This of course leaves faces behind the outside ones, no doubt giving me a really high poly count! Might I find this a problem? Any help would be greatly appreciated.