D3DBSP extension is associated with Call of Duty Direct 3D file. You have chance to open D3DBSP files with Call of Duty game.
It is one of the Call of Duty game files. D3dbsp file includes games material images (texture images). If you get any error message while the game opening, probably Call of Duty is installed wrong. You can try to install the game again or if you have the demo version you may check better version via internet.
What to use D3DBSP
Call of Duty 4
which page related to D3DBSP file
D3DBSP Related Searches
You can check related links about D3DBSP fileextension.