Well i dont want to make a AAA game. I cant make a model who look better than MR Patatoe by myself.

I just want to find why when i use a simple cube in a level whit just a floor nothing else whit a simple movement like that:

move.x += 2* (key_w - key_s) * time_step;

whit a C_move.

I hold W for make my character go foward.. i look at framerate 60fps, than after a couple of second i got a jerk like if my fps have droped during a fraction of second... i got this each 20-30 sec...

I got this from manual :

Through setting time_smooth at a high value (maximum = 0.99), sudden 'jerks' in the game play due to hard disk operations or background processes can be 'smoothed out'.

That seem to be my problem here, i tried time_smooth that help a bit but still anoying.

But again they say : due to hard disk operations or background processes.

ok fine.. but why i dont have this problem whit torque engine or unity 3d..

U gonna say switch for these engines, but i prefer the simplicity of 3dgs, so if these jerk are normal... fine that what i want to know.

Thx.