.MASSIVE File

File extension massive is used in Massive Software solutions,  an industry-first system utilizing AI-driven autonomous agents to generate animation used for generating crowd-related visual effects for film and television.

How to open:

Some 3D modeling tools support this format and support import.

How to convert:

Various 3D models or CAD files can be typically exported to some exchange format or converted between different formats. Once again, not all CAD/3D modeling programs may allow conversion of every format. But, there is always the option of using some of the dedicated 3D conversion utilities with a broad file format support. For general information try to look at:Basic info how to convert CAD and other 3D graphic files