Sapling: Create procedural trees for architecture with Blender
If your project needs lots of vegetation like trees one of the best ways to add those elements to a project is with textures. At least with textures the load to the scene will be minimum. But, if you want to create an animation the textures will look strange, simply because they are all static images. There is an interesting Add-on for Blender, which works on 2.58 that can create procedural trees called sapling. The resulting trees are all 3d models and don`t come close to the quality and realism we can achieve using textures, but the possibility of create animated trees is a huge plus for architectural animation.
Below you will find an animation created with the sapling Add-on. The author of the animation is an artist called TrumanBlending.