Semi-algebraic properties of Minkowski sums of a twisted cubic segment

This page contains interactive 3D models accompanying this paper by Arthur Bik, Adam Czapliński and Markus Wageringel.

Define A_3,n to be the set of sums of n vectors of the form (t,t²,t³) with -1 ≤ t ≤ 1. Here are models of A_3,n for low n: