This design has been replaced by the new version: The FilaBench
https://www.prusaprinters.org/prints/42585-filabench
Revision 2 of this design adds more length to legs of the bridges reducing failure due to adhesion issues. A Revision 3 will be coming in the near-ish future with a number of other improvements.
This print was designed to help quantify the differences between materials.
It includes:
Angled Overhangs
Curved Overhangs
Stringing Pillars
Bridging Lines
Warping Lines
I have also put together a comprehensive document on measuring the results available here:
https://drive.google.com/file/d/1eBn_b7q3kmJTFcNEaLau9wsArVeJqgEA/view?usp=sharing
In order to measure the results, you will need a set of calipers.
Print without supports.
The author hasn't provided the model origin yet.