3di Unlocker 〈Newest〉

Search for a converter that targets only geometry extraction. For example, a Python script that uses py3di library to dump vertices and faces.

Transfer the .3di files to a laptop, disconnect from the internet, and run the unlock script. 3di unlocker

Use a hex editor (like HxD) to open a small .3di file. Look for headers like [INTERGRAPH] or [LOCK_V2] . This tells you which unlock mechanism is used. Search for a converter that targets only geometry extraction

Assume you have a hard drive of locked .3di files from a 2008 Intergraph Plant Design System. You own the data but no longer have the software license. disconnect from the internet