"even more than with Gamestudio" - well my last project was build more or less from scratch with OpenGL and a simple platform layer library so that's not much of a problem.... It's much more the contrary, I'm interested in how much I CAN do myself, like writing my own renderer on top of the GL/DirectX abstraction layer. So far it looks really good because it doesn't seem to pose any limitations in that regard which is nice. Thanks for the reply Felix, if more specific questions pop up I'll be sure to come back at you.