This was in the Grasshopper forum, then disappeared while I was working on it
What a burn
It was moved to here:
I was going to mention Rhino Polyhedra and this GH code that uses it, which I belatedly posted in August, 2024 (original was done in October, 2022):
But today I decided to try a geometric construction approach and came up with this:
Chamfered Cube_2025May8a.gh (19.0 KB)
This requires adjusting the ‘Parameter’ slider (blue group, zero to one) to minimize the value in the text panel below it. It’s interesting even when the text panel value is not minimized.