All about 3DA Files

The 3DA file type is primarily associated with 3DActor.

3DA	File extension: 3DA
	File type:	3D model file

What is a 3DA file?

3DA files mostly belong to 3DActor. 3DA files store 3D model data used primarily as 3D actor files. These files hold information on geometry, mapping, and sometimes animation data, making them a core component in 3D visualization and game projects.
Key details sourced by FilExt.com include:

Purpose: To store data that defines 3D models or actors for use in digital art and game environments.

Structure: Some versions use a Microsoft Compound Document format to organize multiple data streams.

Creators and Software: They are often produced with tools like 3DActor and 3D-Coat, and may be utilized in related editors.

Usage: The files are integrated into 3D projects where model geometry and texturing data are required.

FilExt.com tip: For viewing a 3DA file, use a 3D viewer or editor that supports these file structures. Converting to more common formats (e.g., .OBJ or .FBX) might help if the native support is not available.

How do you open 3DA files?

You need a suitable software like 3DActor to open a 3DA file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your 3DA file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a 3DA file directly in the browser:. Just drag the file onto this browser window and drop it.

Online 3DA Text Viewer

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Online File Viewer

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3DA format details:

To find out what program is needed to open 3DA files, you need to determine the file format. The file format can be determined based on the file extension and the signature (the first few characters of a file). However, different programs can use the same file extension, and file extensions can be assigned incorrectly. If there are problems opening a file, you must first determine the file format used. Our evaluation of the 3DA files is as follows:

The 3DA file extension is not found very often and includes different formats for the applicable programs. The following file formats are most commonly found in 3DA files:

• 65% of all 3DA files are 3D model files. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. The file size is in the range of 10 KB to 1 MB. This is an old file type which is rarely used today. Some examples of file names are Byk.3DA. Files like these are sometimes connected to pantera, arbuz and show.
• 20% of all 3DA files are based on the Microsoft Compound File format, also known as Composite Document File format or OLE2 compound document format. This Windows file format has features similar to those of a filesystem format with virtual files and subfolders. The Compound Document format is always starting with the bytes D0 CF 11 E0 A1 B1 1A E1. There is also a CLSID, a globally-unique identifier of a COM (Component Object Model) object: 34894aa9-7003-4c4f-9f22-36f8dce24390. The internal containers are called AssemblyInfo, Material, TriModels and Workplane. A typical file size is 8 MB.

The remaining 15% of all 3DA files are different files with different signatures, such as ArtCAM. Just click the "Choose your .3da file to analyze" button on this page to find out what your 3DA file is.