Working demo: http://f0x.me/OpenComputers-3D-Designer/
You can also use in conjunction my Blender plugin to easly create and export your models to 3DM format:
https://github.com/F0x06/Blender-OpenComputers-3DM-Exporter
Copyright (c) 2015 Kevin Velickovic
This program includes works distributed under other copyright notice(s).
Please read the COPYRIGHT.md file for more information.
This program is licensed under the terms of the GNU Affero General Public License v3 (GNU AGPL)
This program includes works distributed under the terms of another license(s).
Please read the COPYRIGHT.md file for more information.