I've always loved Game AI. I've read about it as much as my wallet allows and implemented many different small samples - culminating in a number of interactive games in my upper years of college/university, however the stumbling block for me has always been getting things on screen. I'm not terribly great at graphics programming (I've used c++:dx/ogl, c#:xna and even winforms) but most of all, I really don't like it. It's all very cumbersome.
Are there any existing systems available (preferably for .NET) that can easily render primitive objects to the screen? An awareness of actors and physical objects would be a plus (I've worked with some .NET physics engines in the past, so I could integrate one, thus it's not a must but definitely a plus).
The key is that I am NOT looking for a game engine. Far too often do they seem to want to do much more than I need and end up getting in the way of what I'm really trying to do. I don't want to have to deal with loading models, creating and applying shaders, adding lights or any of that.
Really, I just need something that is aware of 3D space, and can render spheres, rectangles and triangular prisms with ambient light - preferably with built-in physics.
So maybe I am looking for a game engine, but it has to be the worlds most simple and unambitious game engine.