Let's try again

World Machine can import the following formats.
- .ter (Terragen)
- .bmp
- .tga
- .r32 (32bit RAW)
- .r16 (16bit RAW)
- .raw (8bit RAW)
And it can export the following formats.
- TGA (8bit)
- RAW (8bit)
- BMP (8bit)
16bit+ formats
- .ter (Terragen)
- Leveller
- Povray-TGA
- RAW16
- RAW-FP32
- BT (VTP format)
- PGM (ascii)
So.. if you can prepare your site design data in any of the formats it can import then yes you should be able to work further with that data in this program. That's my uneducated guess..
/ Max