Convert prj to x3d

What is the difference between .prj and .x3d?

Description: PRJ (3D Studio Project) files are project files used by Autodesk 3D Studio, a 3D modeling and animation software. These files contain information about the scene, such as the objects and their properties, as well as camera and lighting settings. They are used to save and load 3D projects in 3D Studio.; X3D (Extensible 3D) is a royalty-free open standard file format used to represent 3D computer graphics. It is used to store and interchange 3D model data, including surface geometry, color, animation, and metadata. X3D files are built on the XML standard, and can be viewed and edited with a variety of 3D modeling programs.