Today I've added an "Explosion object" and some sound. Also I've compiled and tested it on Windows (I was coding on Linux) and it runs reasonably fast in my old PentiumIV, since I didn't optimized anything from the engine (except the octree for objects, and I think I can do it "better") and I forget to use -O3! So once I optimize the engine may be you can play in a PentiumIII...
Then I did some cleaning on my code so tomorrow I'll start with the "mission description" and AI. So two weeks to code the UI and create the game missions. Not bad.
The problem with skyboxes is to create the texture. Render it is quite easy. I just draw a 10x10x10 cube with rotation and no translation (and no Z-Buffer, no fog, etc).
If you have problems with it, I can post the code here.
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