I just noticed that in 2.5 there’s no reactor type on the particle system.
My doubt is if it hasn’t been added yet or if it had been replaced with another way to do it.
And if it has been replaced, how to do it.
From http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Tools
These features are NOT yet implemented, but will be in some way at some point. Everything else that’s not working can be reported.
Collisions & force fields for hair dynamics
Effecting particle properties with:
Weight groups
Textures
Reactor particles
Conversion from some old files could be better
Global vs. local time
Hair seams
Animating particle colours - needs to be re-implemented differently, maybe as a material node/property/texture.
Full support for rendering dupliobjects & groups with particles
[#23714] Linked instance group with particles doesn’t render properly
hum…
Ok then