Terra Firma is a simple toy/tool that allows you to examine the effects of erosion and water-table changes and tectonics. It's more of a time-passing simulation than anything else, and is, for now, very limited in what you can actually do, simulate, and create. About all you can do is shove landmasses together, raise and lower terrain, and create water, and then watch the effects of time happen.

As it grows, it will continue to be more interesting, but at the moment it's mostly just a time waster for a night or so. It's also free, though, so no complaints.

Terra Firma is a simple toy/tool that allows you to examine the effects of erosion and water-table changes and tectonics. It's more of a time-passing simulation than anything else, and is, for now, very limited in what you can actually do, simulate, and create. About all you can do is shove landmasses together, raise and lower terrain, and create water, and then watch the effects of time happen. As it grows, it will continue to be more interesting, but at the moment it's mostly just a time waster for a night or so. It's also free, though, so no complaints.