Credit to Wandaaaa and the creator of this Photo, two thumbs up for bringing PS to life!

You can download the Hi-res HERE
Trust me..it looks even better in high resolution =)

Negative space can simply be defined as the space not used. Negative space enable us to create optical illusions, where we focus on one image, and only when we shift our perception to focus on the negative space, do we see another image as well. In above case, it's between a vase and two faces.

































