.e3d is Macromedia Extreme 3D object
Key Features: .E3D File Extension
What is an .E3D file?
The e3d file extension is associated with the Extreme 3D that was a 3D design package developed by Macromedia. The .e3d file stores 3D object.
Macromedia was acquired by Adobe and Extreme 3D was discontinued.
This e3d file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.