There is only one file type that uses the .LXO extension:
Modo 3D Image
An LXO file is a 3D image created by Foundry Modo, a 3D modeling, animation, and rendering program. It is used for storing 3D scenes generated in the software. LXO files can be used for rendering high-resolution images and animations on a single computer or on a network of computers.
Modo's 3D images and animations are used in video games, professional photography, film, and print advertising.
NOTE: Foundry Modo was formerly known as Luxology Modo before Luxology merged with Foundry.
Updated: July 24, 2020