Greetings, I've been dabbling with 2D game programming over the last year as a stepping stone into the world of 3D. I've programmed several pong, tetris, and breakout clones, as well as a few of my own ideas along the way. I've learned quite a bit so far. I've decided that I'm ready to take the jump into the 3D realm. My plan is to stick with XNA and C# which I've been using for my 2D adventures. My question is this: Do you guys have any suggestions for a good path to follow when learning 3D? E.g. Start with getting a model on the screen, then build a terrain engine, etc. I started off displaying a single primitive on the screen which seemed to work alright. Did simple stuff, made it rotate. Colored vertex. Played with input handling. Then I followed a tutorial for building our some terrain based on a heightmap, which went ok for the mostpart. But, from single triangle to terrain, now I'm concerned about view, world, and projection matrices, XNA "effects", figuring out a "camera" (and how it fits in with the matrices), maybe a scene graph, etc. I don't think any one thing is beyond my comprehension. I'm just having a hard time coming up with a logical progression for learning the pieces of the puzzle, how they fit together, and why. How did you guys go about learning the pieces when you dove into 3D? Thanks!