The better the track looks via the textures the more fun it will be. So make it possible to use higher res track textures in d2 then simply make it when you export the track d2 put all kinds of labels on the file so people know it's a high res version, and then if creators can be bothered, just upload 2 versions with a low res and a high res. Theres already thousands of tracks to play, people aren't gonna complain if creators start knocking out a couple high res tracks their computers can't handle.