I made a collage of stills to fill the frame. Each still has a different size. I used crop and a Bezier mask on each of them to fit them all together. Now I want to flip them individually. But when I apply the 3D blind transition with 1 division to each of them, they all turn together like one picture. How can I have each picture turn on its own axis instead of the centre of the whole frame? Using more divisions will only work when the pictures are uniform in width. Which they are not. They can't be.