Originally Posted by harlyo
Kanga : thanks for the link its all i need for comparison
one more question : if i want to do smoke , fire , clouds , sparks , all types of these things using a plugin like chaosgroup phoenix FX can i import it into nuke and composite it with my scene and control it from there ! or does nuke have its own particle system that do all of that ? and if it does is it good enough to use it instead of using a plugin ?
Nope-those are all 3d simulation FX. You need to do those in the context of your 3d scene/software and render the result.
The comp programs work with the render output from the 3d program. You can use comp to tweak enhance the fx (add glow for example) but they cannot alter the fx/simulation directly. You have to go back to 3d for that.
The native 'comp particle plugins' are 'good enough' for some people. But they are limited compared to the 3d ones if photo real look and behaviour is the goal.