I got a little bored and decided to make this... If enough people ask how to import OBJ into scratch, I'll make a project on it! OBJ is an encoding method for 3d models. When you export a 3d model (such as Sunsanne from Blender), you can access the values and rewrite them for scratch. I made a python program for this, I can share it if people want.
@TheLogFather for the triangle filling algorithm