Many Liquib Tools and Effects were applied to produce the background for this Masked image.  The most noticable are Echoed Clones, followed by using the Wipe Tool Solarize Action to create odd, darkened colors.  Then a heart shaped Stencil was set as a Mask and another image was loaded into that.  The Bloom Tool and the Aura Effect were used to add some bright colors within the heart.  Finally, a large Stationary Echoed Clone was applied at the center.  (The steps used to create this image are stored as the AlienValentine sample Script, so the same sequence can be performed with any two source images!)
Liquib Alien Valentine