Importing allows you to bring in models from other formats not used by Shapeshift.

T-Mesh

T-Mesh is a Top Down 2D Map Editor for P3D by Lizard King (Creator of P3D).

T-Mesh data can be saved to your clipboard or to a text file (.txt). Shapeshift supports importing T-Mesh from txt only. Points will not be imported correctly and manual changes will have to be made to connect the points properly.

OBJ

Wavefront OBJ is one of the oldest and simplest 3D formats, stored in plain text which can easily be loaded into a text editor.

Importing from .OBJ doesn't support .MTL files, but will bring the materials in with randomized colors. It's recommended to Triangulate your Geometry before attempting an import.