I was planning to change the shape of a rectangle (3d, using replication) to an other with a kind of leaking effect, but the possibilities to change the control points of a rectangle are quiet poor in keyframe editor.
Now I am looking for a possibility to "fill" the rectangle to inside an other using "preserve opacity", but I would need the second rectangle to be invisible but showing only the first rectangle inside.
Yes, I can not edit every single points of a rectangle.
And this is aggravated with a bug in Motion 5.0.3: when I change one or more points I get one single keyframe in keyframe editor (without value, determined only in time) but if I move (right-left) this keyframes it donesn't take effect at all, only if I delete all of them..
The described method what for I am waiting some help is just a secondary way.
I understand this aggregate keyframe concept.
The bug is I think that after taking some aggregate keyframes I can not change the result with moving this keyframes in time. So it seems the rectangle is not in connection with this aggregate keyframes.