Morph

After Effects morphs a path by moving each vertex of one shape to the matching vertex of the next. Almost every bad morph has one of two causes: the shapes have different vertex counts, or their first vertices sit in different places. Fix those two things and most morphs just work.

Shape-to-shape morph

1. Both shapes must be Bezier paths. Rectangles, ellipses and stars are parametric and can't morph into each other. Author the paths as vertices (ae_shape {"shape": "path", "path": {...}}), or convert a parametric shape: select its path property with a raw script, then run ae_menu_command {"command": "Convert To Bezier Path"}.

2. Read both shapes' vertices:

   ae_layer_detail {"layer": "Icon", "path": ["Contents","Group 1","Contents","Path 1","Path"]}