A Pentakis Dodecahedron is made up of a dodecahedron (which has 12 pentagonal faces) and a 5-sided pyramid added on each face. The Pentakis Dodecahedron is also known as a Kisdodecahedron. I call the Spiky Amount slider a Cactusometer. It shows the "Coefficient of Spikyness" as the project runs but that was a bit long to write, so I called it "Spiky Amount".
Huge thanks to @TheLogFather for his "Faster Triangle Filler" https://scratch.mit.edu/projects/24828481/ According to Wikipedia, the object is: - a Pentakis Dodecahedron when Spiky Amount = 1, - Wenninger's third Stellation of an Icosahedron with inverted pyramid faces when Spiky Amount is negative, and - a Great Pentakis Dodecahedron if it is very spiky (more than here) https://scratch.mit.edu/projects/211987200/ https://en.wikipedia.org/wiki/Pentakis_dodecahedron Theory to rotate a 3D object: https://en.wikipedia.org/wiki/Rotation_matrix
