Ever tried to animate the masking of multiple areas of an image and found that everything goes wrong?

Well here’s a simple tip.

Flash hates a mask that’s in pieces. Sometimes it’s fine but sometimes it messes up, for example if you have an animation of eyes blinking, using masks to hide / show the pupils, either use one mask that is connected out of the area of interest or two separate masks for each eye.

Note: Beware of strokes or the remains of partially deleted strokes in masks. Select the entire mask frame and switch of all strokes from the selected vectors to ensure that those pesky bits of corners or minuscule remnants don’t get in the way of your masking genius!