A USD is a Universal Scene Description file that encodes data to interchanging or augmenting information between different content applications. Whereas, a USDZ file is an uncompressed and unencrypted ZIP archive for USD files. Sometimes, you may need to convert a USD to 3DS or USDZ to 3DS file. Accordingly, this article covers how to convert a USD or USDZ file to 3DS format programmatically in C#.