Chamfered pads.
“Chamfer size” 29,3% seems to be close enough to make an octagon.
This feature is apparently not compatible with v5, so if you use it you have to stay in nightly builds. It’s like rounded rectangles were for v5 after v4.
Edit: this is also possible with chamfered pad because it has also rounding, actually it’s like a rounded rectangle + chamfers.
