Acropora 1.0.0045

I have used this software with great success. I am uploading as per a conversation on the forum. Hope it helps.

Acropora

A procedural modeler, Acropora combines volumetric modifiers with multi-octave 3D noise sampling to generate detailed surfaces in far less time than conventional surface modeling software. Acropora adopts a less deterministic approach to generating complex, organic shapes by applying sequences of modifiers on large voxelized meshes. The effect is to create an endless, seamless expanse of surface that undulates and changes in a natural way. The resulting meshes contain caves, ridges, overhangs and other natural features that are not possible with height maps. Meshes can then be broken up into segments, with segments further divided into different levels of details.

Just some of the features available:

A variety of base shapes including sphere, plane, cylinder, torus and others.  

Compound shapes (heightmaps, pillars, caves, weaves)  

Terrain generation tools  

Cave creation tools   

Voxelisation of user imported models (.3DS, .FBX, COLLADA, .OBJ)  

Mesh export to .3DS, .FBX, COLLADA, .OBJ  

3D texture export of voxel volume to .DDS format  

User-specified volume block and voxel dimensions.  

Over 50+ volume modifiers  

Automatic generation of up to 15 octaves of noise (user-programmable settings include orientation, strength, quality, frequency, phase, and range of influence)  

Extensive voxel and noise editing tools  

Batch processing  

Multiple LOD support   

Intuitive editing and manipulation of very large meshes  

Seamless joining of adjacent meshes  

Mesh decimation, smoothing and tesselation.  

Mesh filtering and vertex blending tools  

Ambient occlusion  

FX effect file support and multitexturing  

Multithreaded CPU support and GPU acceleration (on supported cards)