This widget is under development,
not fully functional, and probably really buggy.
Only one camera is supported in flow currently.
Only one light group is supported in flow
currently. In the future, multiple light groups will be supported and selected
here (i.e. one light group may be very simple, used for scene building,
and another more complex one could be used for rendering)
flow can have multiple particle systems.
To add a new particle system to the scene,
double click on 'Particle Systems'. The new system will be given a number
as a label, which can be changed in the Particle Control particle combo
box. However, renaming is kind of flakey right now, so the name you enter
may not update correctly.
Highlighting the particle system should make
it the active system in Particle Control, but this is currently broken.
The checkbox next to the particle name should
enable/disable that particle system, but this is currently broken.