hmm, still a little confused on the topic, okay, so this example:

i have a sprite that removes when its alpha hits 0, and i say:

alpha -= 10 * time_step

with low fps this allows the sprite to be removed in the same amount of time it would take on normal fps ? right ? but to be honest, wouldnt it make more sense to just let the effect remove faster and thus stabilize the framerate quicker ? such as using time_frame ?

or am i looking at it all wrong ?

ok after some tests am getting the basic concept, its a bit tricky to know what scenarios its best used with but now i get it, so i'll lock the game at 60 fps then =]