.BT File

File extension bt is mainly associated with VTBuilder, a 3D modeling tool for constructing virtual world, and used for terrain data files (elevation grids).

The BT format was designed to be simple, compact, easy to read and write, and flexible in regards to size and coordinate representation.

Files with bt suffix can be most often encountered as special terrain data (elevation grids) files saved in a unique binary format from VTBuilder.

How to open:

Use VTBuilder to work with the .bt files.

How to convert:

VTBuilder can be able to export terrain files to other modeling file formats.