So this decouple the physics from the render rate doesn't work so good. You get a really annoying jitter.
So I give up. I'm just going to lock the whole game loop to 60 fps. Runs a lot smoother, although I've only got a 60hz monitor to test it on. Hopefully it won't look too bad on an 80hz.
And if your computer can't manage 60fps, it is below the minimum spec for the game.
Don't know what else to do really.
Bugger.
Aaah! No! Don't give up! [sad]
I can empathize with your pain, trust me. I dealt with timing/framerate issues like these through a huge part of Skirmish Online's development, which was sheer anguish. However, it was the act of not giving up that eventually led me to solve the issue.
I stay stick to it, and keep on trying things until it works. You'll thank yourself in the end when you have a solid framerate-independant solution on which to base all future projects on. [smile]