D3D File

What are D3D files and how to open them

Are you having problems opening a D3D file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your D3D files.

What is a D3D file?

D3D files have multiple uses, and Corel Dream 3D Scene is one of them. Read more about the other uses further down the page.

Corel Dream 3D Scene

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open D3D files

Important: Different programs may use files with the D3D file extension for different purposes, so unless you are sure which format your D3D file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested five different D3D openers which you will find listed below.

Last updated: September 21, 2026

All known file formats using extension .D3D

While Corel Dream 3D Scene is a popular type of D3D-file, we know of 3 different uses of the .D3D file extension. Different software may use files with the same extension for different types of data.

CorelDream 3D Drawing

CorelDream 3D Drawing is a legacy file format used to store three-dimensional vector/mesh artwork created with the Corel Dream 3D application, a 3D modeling and graphics tool bundled in older versions of Corel's graphics software. It preserves geometric objects in 3D space (such as mesh surfaces or wireframe structures), along with materials, colors, and simple render‐preview settings. Files in this format were meant for designing, editing, and sharing lightweight 3D illustrations rather than heavy CAD models or full animation sequences.

The format is written by Corel Dream 3D, which was included in CorelDraw Suite version 6 for Windows. Artwork created is editable inside Dream 3D and can often be previewed in CorelDRAW or other Corel tools that support 3D import. CorelDream 3D Drawing files are not widely supported in modern CAD programs, and conversion tools are rare, so preservation typically requires Corel's own software.

A technical identifier appears at the start of the file: it begins with the ASCII signature "3DC{<CR><LF> asci1<CR><LF> vs…" at offset 0, followed by a dot at offset 22, then the string "…sf "CorelDREAM 3D" …prvw" around offset 24. These markers distinguish this format from other, unrelated file formats using the same extension.

DESIGN 3D Scene

Design 3D Scene files are scene description files produced by the DESIGN 3D application for the Atari ST computer. These files represent full 3D scenes - including object geometry, possibly separate facets or faces, world definitions, object names such as "OBJ", and camera/world context - to allow the DESIGN 3D software to recreate, view, edit, or render a complete 3D scene as designed within that program.

DESIGN 3D writes them when a user saves a scene modeling project. Such a file would be opened again later in DESIGN 3D to continue editing or to export to other formats for rendering or use in other 3D tools. The scenes typically contain multiple objects, each described by facets (faces), and include metadata such as the world coordinate system ("WORLD") and references to object definitions ("OBJ."), following the conventions of DESIGN 3D's 3D modeling engine developed by Vincent Beltrame.

Files of this format can be identified by internal signatures at specific offsets. For example, the file begins with bytes "D3D\." at offset 0, a copyright line "D3D (C) Vincent Beltrame 199" starting at offset 10, and contains strings like "WORLD", "FAC.", and "OBJ." that mark sections defining the world parameters, facet definitions, and object definitions respectively.

Various apps that use files with this extension

These apps are known to open certain types of D3D files. Remember, different programs may use D3D files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

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