It`s maybe stange, but with this values the code is 98% framerate independant. Same jump hight at 5FPS and 80FPS. Maybe the Acknex engine confuses the time_frame and time_step variables in huge projects with many simultan functions and many entities? Hm.
player_movevector[2]=4+4*time_frame;@3Run I try to get my own to work without bugs. But if I really get stuck anywhere, I`ll PM you

Thanks.
@xxxxxxx Yes and it seems to work. Thanks very much. I forgot to set those flags when I tried to setup the collision box manually like 3Run said.
Thank you very much. I really appreciate your help!