July 11, 2011, 10:34:23 am
There's a beta out which makes selection easier by filtering per object type. We are putting the finishing touches on this version and soon there will be a new release with many tweaks and bug fixes for SP2.
You add smoke by selecting the special effect category and you can drag in fire, smoke and other particle effects.
The waterfall is a material. You can import a model which has the shape of your waterfall, river, whatever and then apply this material to turn it into water.