Introduction:
Invention mod allows you to add flans mod toolbox 3D models into blocks, it also allow you to create simple block and stair with custom textures. to do this you need to follow the tutorial linked which is really helpful and was made by War Monger, one of invention original developers.

History of invention:
Invention dates back to 2017, it's code was originally made by deltric and it's original 3D models was made by War Monger (the War Monger models are not included in this download). Since both Deltric and War Monger stoped developing invention, me in need of a good and easy to handle decoration mod with my own models decided to bring it back to life, and today i present you a full working invention mod, i will also include it's src in the future so all of you will feel the possibilities of using invention to add your own 3D blocks!

LEGAL:
Deltric gave me permission of using his code and revamp invention mod into a working mod again as for war monger, im not using his models.
Here's a picture of my conversation with deltric: