How do i make particles fade/dissolve/evaporate

hello there helpful one :smiley:
how do i make my smoke particles fade out insead of just poping persay
im useing 2.49 too, i just cant figure it out…

also if anyone knows how to make the invisible like heat thing abouve a fire that would be awsome
Thanks in advance :slight_smile:

Use an IPO to scale the object up and then also lower the alpha. You can do this by pressing the I-key when your mouse is over a channel (in the IPO window, I think).

that is a weird way to do it i know that the alpha makes it see through, and u cant scale particles… i think i cant remember well i cant find out how to scale the board particles…