Attached Link: 3 types of trees

A lot of detailed trees can quickly tax your computer's memory if you don't have huge amounts of RAM. This is especially true if you have several Poly-heavy models or terrains in your scene. I tend to use detailed 3D trees (Bryce treelab, or otherwise), only in the foreground, or sometimes midground of my picture. For trees in the background 2D clipmap trees or terrain trees can work very well, and save you a ton of rendering time. I used all three methods for this pic I did some time ago for a Forum challenge.