Thanks for the replys guys, RealFlow can be a lot of fun

Anyway, I now have a new toy - MaxwellRender. Here is my 1st effort.

Incase anyone interested - this scene was lit with a single emitter plane to the right of cam. The render took 8.5 hrs and got up to 17 sample layers on a 3.2 gig P4 with 1.5 gig ram. All the materials are from the Maxwell material gallery.

As you can see there is still a bit of noise in the render - maybe another 8.5 hrs and would have been nice and clean...

Enjoy!