rob Posted May 4, 2008 Share Posted May 4, 2008 I have been able to grow my particles Pscale attr using $LIFE * (rand($ID)*.6 + .1) which is fine. I understand I can create a spare channel which I can then key frame , to make my particles scale shrink over the last few frames of their life something like this maybe $LIFE * (rand($ID)*.6 + .1) * chf("lookup",$LIFE*100) Should I be using attribute create ? Rob Quote Link to comment Share on other sites More sharing options...
edward Posted May 4, 2008 Share Posted May 4, 2008 Why? Quote Link to comment Share on other sites More sharing options...
SpencerL Posted May 4, 2008 Share Posted May 4, 2008 I would definitely stick with the way you are doing it with the spare channel vs an attribute. Creating an unnecessary attribute will just slow down your sim (even though it will only be a tiny amount) because it will need to calculate this attribute for each particle every frame. Quote Link to comment Share on other sites More sharing options...
rob Posted May 4, 2008 Author Share Posted May 4, 2008 Thanks Spencer , there are so many ways to do things and as a relatively new user , its hard getting the correct work flow let alone all the new terms. Although after getting my spare channel working I don't think my expression works as expected! R Quote Link to comment Share on other sites More sharing options...
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