Let's say you're working on a model for a new Rock Raiders vehicle, or making a fan game, whatever. Often times people just use exports of LDraw models or similar things, without thinking about it too much. They'll also probably be told this isn't a very good idea, because the results will be highly inefficient. But just how inefficient? Let's find out.   For those who may be new to all this: When you create a model with LDraw-based software, LDD, or Mecabricks, the saved model doesn't