.BTO File Extension
File TypeBryce Tree File
What is a BTO file?
3D object used by Bryce, a program used for 3D modeling and scene generation; contains a 3D model of a tree that can be added to a larger scene; used for generating landscapes with specific types of trees, such as pine, birch, or maple trees.
The Bryce installation includes several BTO files in the /Presets/Trees/ directory.