Hi I checked out the Vue site and here's what they say about importing different formats:  (Just FYI)

IMPORTS 

3DS: 3D Studio� object file format.
COB: TrueSpace� object file format.
DEM: USGS Digital Elevation Model. Terrains are placed according to information in the file (ideal for importing multi-part DEMs).
DXF: AutoCad� object file format.
LWO, LWO2: LightWave� object file format.
OBJ: Wavefront� object file format (with automatic MTL library conversion).
PZ3, PZZ: Curious Labs� Poser� static scene import (requires Poser 4, 5 or 6).
SHD: Shade� object file format.
TGA: 16 bit RG encoded Targa altitude map.

PZ3, COB, 3DS, LWO and OBJ formats are converted together with UV mapping information and texture maps.

Vue 6 Esprit exports terrains (UV mapped with textures) as COB, 3DS, LWO, OBJ and DXF files. Terrains can also be exported as grayscale picture files.