@gaieus said: For such, organic "sculpting" I could suggest two plugins (both cost a bit of money but not much). One is Vertex tools which is perfect for terrain shaping and the other is Artisan that is a more generic but extremely powerful organic tool. For such "organic" modeelling and complex textures, I also suggest checking out Blender. It's free, open-source software, and may better suit what you want to do - though be warned, it is a mightily complex bit of kit, so not half as easy to learn/use as Sketchup! It will also happily import Collada or OBJ exports from Sketchup - so you can have the best of both worlds; using SU for ease of modelling, and Blender for the "fairy dust" to make things look prettier.