I am responsible for all compositing and editing work. These are my processes in AE because we use render pass in Maya, so I collected the render sequences and composited them. There are 15 shots which include scenes, characters, and Portal. I use some pictures drawn by 2D animators to make special effects such as glow so that the still images will glow or let the 2D graphics be projected in the scenes. Besides, I had to make the characters and the background look harmonious, so a lot of colour correction was done.
These images on the left are before compositing, and on the right are after compositing.