.TDDD File Extension

Three-dimensional image data file created by Imagine, a an older 3D modeling and raytracing program; stores 3D objects and optionally observer data; can be used for for rendering 3D images from various observer perspectives.

Imagine was originally developed for Amiga computers, but was later released for MS-DOS and Windows platforms. The software is no longer supported. Imagine was previously called TurboSilver.