This text likely refers to a commonly found on digital marketplaces or forums, where "solid post" is slang for a high-quality upload. It describes a compressed archive containing 3D models in the industry's two most universal formats:
Creators on platforms like ArtStation or Free3D package models this way to ensure compatibility across different software. FBX OBJ.rar
3D File Formats: OBJ, FBX, GLB, USDZ, and Delivery - Threedium This text likely refers to a commonly found
A compressed folder used to bundle these files into a single, smaller download. Common Uses for These Files and skeletal rigs.
Using pre-made "basemeshes" to jumpstart a sculpting or texturing project in software like 3ds Max . How to Open Them
A high-fidelity format by Autodesk that supports complex data like animation, textures, and skeletal rigs.