I have a model which draws correctly in XNA4. However if I try to add a background image (or any sprite), the rendering of my model is messed up. There are two problems with the rendering model is ...
Note: I've already found an answer (which I will post after this question) - I was just wondering if I was doing it right, or if there is a better way. I'm making a "2.5D" isometric game using OpenGL ...