The filter interprets greyscale images in 3 dimensions by assuming light areas are higher than dark areas. Preview, adjust, and scale and other settings before exporting to 3 popular DXF formats. Demo does not save. Save files in 3DMF format, viewable on the Web with the Whurlplug plug-in. The Lite version cannot save models with more than 50 objects.
Sculptor is a modeling tool that works much like clay.
You use the included shapes to add or subtract material. It's intuitive, and the results are often organic. The program outputs to DXF and Mirage formats for rendering. This fantastic freeware landscape generation program has controls for mountain, fog, water and sky color, noise type, random seed, illumination, wave parameters, and more. With enough time and tweaking, it produces amazing results.