I just got this software for osx.. got the demo and then decided to buy it becuase i liked it so much. Just a heads up to all of you making your own cases, this software is a very useful tool that lets you use measurements and make a digital concept before you actually start constructing. I'm not advertising or anything, I had just never heard of this before i stumbled upon it on version-tracker, and it turned out to work really well and thought maybe some of you might like to try it out too.
you can try the windows or mac versions here
BTW: it doesn't render photo-realistically, but i kinda like it, reminds me of XIII.