CLOD method

About U3D

Universal 3D (U3D) Format
U3D is a 3D data structure and file format, one of two systems used in 3D PDF documents. Along side PRC, U3D is the historical foundation used to embed 3D interactive data and models into a PDF file. A PDF file containing U3D based 3D model can be viewed in using the Adobe Reader as well as other tools. […]