In the article “Analysis of Nonideal Shape Evolution during Potash Alum Crystallization Using Microcomputed Tomography and Three-Dimensional Image Analysis” (10.1021/acs.cgd.0c01644) we explain how the shape of crystal populations (10 000 crystals in total) can be analyzed using micro-computer tomography. We describe how the shape of crystals evolves even though all growth rates remain unchanged.