Pretty interesting stuff. Wonder if it might be useful to create clouds in Unity?
Website: Nimbus
Blender thread: http://blenderartists.org/forum/showthread.php?t=118019
Its easy to copy this effect with particles in Untiy.
Just apply a gradient to a cloud shaped alpha channel and there you go.
I am currently testing a shader, where the gradient can be effected via script, so you can change lighting and density of the cloud during runtime.
Results will be posted here:
http://forum.unity3d.com/viewtopic.php?t=8881&start=45
Frank