So, my partner in crime https://dustzero.deviantart.com/:icondustzero: recently got his hands on a great vectoring program. In order to raise the quality, we are using vectors for the majority of our art which gives us two huge advantages. Vectors are endlessy scalable and it allows Flash to animate additional frames (shape tweens) with just a few vectors serving as keyframes. For example, the eyelids consist of four keyframes while Flash makes it eight frames through the use of shape tweens. This is also how I animated the breasts. But they had only a few keyframes and a whole lot of frames in between.

On top of that, we want to add details and interactivity to the girls to make them seem more alive instead of just a static image. The eye-tracking is just a small portion of that.