tera4dChapter 1: Tetra4D Reviewer™ overview Tetra4D Reviewer™ is a companion product of Tetra4D Converter™. Tetra4D Converter™ allows you to create 3D PDF documents from a wide rangeTetra4D® Converter . The world’s leading solution for converting. native 3D CAD data into rich 3D PDF documents. Tetra4D Converter is the world’s leading solution for converting native 3D