Download Leveller

Powerful and easy-to-use 3D heightfield object/terrain editor. Imports elevation data from BMP/TGA/GIS/DEM/RAW, exports to POV-Ray, RIB, DXF, VRML, Rhino, etc., supports bitmap texturing and colormapping, game-style Flight navigation, bitmap-style editing w/ 3D OpenGL scene view. Tools include dig, raise, rubber stamp, ramp, smooth/sharpen, etc. Filtering and free plug-ins。
Features：
-Professional modeling
-Unleash the artist within
-A user interface you already know
-32-bit Precision
-Great visuals
-Lots of plug-ins — power galore
-Import, export, and interoperate
-Displacement mapping
-Make your mark
-Tons of documentation