This image is slightly inspired by one scene from animated feature film "Princess Mononoke". On that scene, I liked idea of island in middle of forest lake, and that old tree. But, I didn't want to make exact copy of that scene, so I rather made something bit more "realistic" and a bit more mine.
Base mesh for Old tree was made in Zbrush with Zspeheres. Becouse I was still learning Zbrush, I have to do so some final touches and textures in Mudbox. I know that this is strange combination of programs, but it worked.
Cliff is also modeled in Mudbox.
Branches for old tree are made from couple of branches borrowed from one Onyx tree, and individually placed on this tree.
Moss on old tree is made with bunch of spheres with displacement.
Ivy is made with Ivy generator same as roots on top of cliff...
Background trees are also 3D models from Onyx tree generator.
Waterfall is not 3D; I have made him in Photoshop.