BT File

What are BT files and how to open them

Are you having problems opening a BT file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your BT files.

What is a BT file?

BT files have multiple uses, and BluffTitler Show is one of them. Read more about the other uses further down the page.

BluffTitler Show

These BT files contain the 3D animations created in BluffTitler Show, a 3D animation software. You can create titles, intros, lower thirds, and bumpers. BliffTitler uses advanced 3D modeling techniques such as depth of view, displacement, and cube mapping. You can add effects to your videos in a fun and affordable way.

How to open BT files

Important: Different programs may use files with the BT file extension for different purposes, so unless you are sure which format your BT file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested five different BT openers which you will find listed below.

Last updated: August 25, 2026

All known file formats using extension .BT

While BluffTitler Show is a popular type of BT-file, we know of 2 different uses of the .BT file extension. Different software may use files with the same extension for different types of data.

VTBuilder Binary Terrain

VTBuilder Binary Terrain files store elevation as a regularly spaced grid of ground-height values tied to real-world coordinates. They are created by the Virtual Terrain Project's VTBuilder tool when converting elevation data (for example from DEM or point cloud sources) into a model that Enviro, the 3-D visualization component of VTP, can render. These files are useful for representing terrain surfaces in geographic applications, simulations, or landscape visualization.

VTBuilder writes these files by rasterizing elevation points into rows and columns that cover a specified geographic or projected area. The grid dimensions, the datatype of each height (integer or floating-point and size: 2 or 4 bytes), the geographic extents or bounds, and the coordinate system (e.g. latitude-longitude or UTM zones) are all stored so that other software knows how to map each elevation value in space. Terrain created via this format may also have an accompanying file containing projection metadata if not fully described in the terrain file's header.

Files begin with a 10-byte ASCII tag "binterr1.3" identifying version 1.3 of the Binary Terrain format. Following this are fields in little-endian order giving number of columns (4-byte int), rows (4-byte int), data size per grid point (2-byte short, usually 2 or 4), a flag for floating-point vs integer values, then projection code, UTM zone if used, geographic bounds (doubles for left, right, bottom, top extents), and finally a small field and float for vertical scale. A fixed-size header (256 bytes) allows software to locate the grid data at a known offset.

Various apps that use files with this extension

These apps are known to open certain types of BT files. Remember, different programs may use BT files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about BT file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.