Here is a list of the supported file formats for Design 3D CX 8.0.
Many users move their models between Strata and other programs. Search the StrataCafe Forums and you'll find many discussions and tips on this topic.

Export - 3D Formats
Collada
DXF (R12)
OBJ
STL
Strata 3D Shape
TGS Amapi
VRML 2
XMM (Strata Live 3D CX)

Export - 2D Formats
Bitmap (BMP)

EXR
JPEG
Macromedia Flash (SWF)
Photoshop (PSD)
PNG
QuickTime Movie (rendered animations)
Targa
TIFF

Import - 3D File Formats
3D Mesh
Autodesk 3D Studio (3DS)
Collada (.dae, .zae)
DXF (R12)
FBX (version 6)
MiniCAD Text File
OBJ
STL
TGS Amapi
U3D
VRML 2

Import - 2D Vector Formats
AI
PDF
EPS v8

Import - 2D Image File Formats
Bitmap (BMP)
JPEG
HDR
EXR
Photoshop (PSD)
PNG
QuickTime Movie
Targa
TIFF