Make your own 3D object using the Editor. Remix to save your 3D object.
Thanks to @Scratch-Minion for the original 3D Editor project. I made a 3D Mario project https://scratch.mit.edu/projects/357143074/ and some Scratchers asked if I could make the picture editable. 3D Tutorial Studio: https://scratch.mit.edu/studios/5040029/ Polyhedron Studio: https://scratch.mit.edu/studios/5085215/ 3D Rotation theory from Wikipedia: https://en.wikipedia.org/wiki/Rotation_matrix Huge thanks to @TheLogFather for his "Faster Triangle Filler" https://scratch.mit.edu/projects/24828481/