Nostril shape keys

In this video we're using the Pose Shape Key addon to create corrective shape keys for the nostrils when moving upward. This usually is refered to as the 'sneer' where we pull the brows and nostrils towards each other (compression). For the nostrils we're gonna create a shape that emulates the skin bulging up. Depending on the style and type of character you're working with, the result may vary from subtle and smooth to distinct and wrinkly.