TDDD

TDDD (3D Data Description), or FORM TDDD, is an IFF-based 3D modeling and animation format.

There are two major versions of it. The first (the topic of this article) was used by Impulse's Turbo Silver program.

The second was a modified and extended version used by the Impulse Imagine program. Refer to Imagine Object File for this version.

Identifiers
The Turbo Silver manual indicates that it uses file extensions .cel, .stl, and .ani (for cells, stills, and animation), but it's not obvious which of them are TDDD format. .cel, at least, probably is.

Identification
Files begin with.

This does not distinguish it from Imagine Object File format.

Specifications

 * Turbo Silver 3.0 format

Sample files

 * TURBO_SILVER_V3.ADF → Objects/RoboHand.turbo
 * Silver.lzh → Objects/RoboHand.turbo
 * http://examples.oreilly.com/gff/CDROM/GFF/VENDSPEC/TTDDD/T3D_DOC/ → *.TDD
 * https://telparia.com/fileFormatSamples/poly/iffTDDD/

Links

 * , from the Encyclopedia of Graphics File Formats
 * Wikipedia: TurboSilver
 * Turbo Silver 3.0 User Manual
 * Internet Archive copy