Hi, I want to get started with a simulation (physics), but I need to create a 3D environment to present it. What I''m looking for is the things I need to know first before I even start modelling the world, like basic concepts, modern ways in storing and creating the world, or just keywords to get me started, web pages, etc. I know about BSP trees for instance, but could be that I''m missing a lot and I don''t want to go back to the drawing board every time I find my methods not fast enough. Thanks