Thip--on vegetation in MojoWorld: Vegetation is a very difficult thing to model well; much harder than the inorganic natural phenomena like terrain, clouds, water and atmospherics that all landscape apps tackle. For MojoWorld, vegetation must accommodate changes in level of detail over a huge range of scales. It must be a surface material when viewed from great distances, as when looking at a planet from space, a volumetric model at intermediate distances, and detailed geometry when seen up close. And, it must do this using reasonable amounts of memory and computation. The mathematical problems in this are formidable. So much so that no one has solved them, not even in the research literture. It's a rediculously hard problem. (MojoWorld has a way of forcing some of the hardest research problems in the area of modeling natural phenomena.) In light of this, our solution is to utilize an open architecture, and to encourage third-party developers--like Xfrog--to provide vegetation via plug-ins. MojoWorld is designed to become cyberspace, the ultimate repository for everything in your computer. So we'll tackle this issue, and many more, in the future. -Mo