I was playing around with the Shatter effect.
I chose Shape>Pattern>Custom. I like the result when I chose a different layer as the Custom Shatter Map but I can't figure out how its applying this. Also it leaves some residue pieces of the shattered that I cant get to move at all.
Any suggestions on learning how this effects applies its settings
It's based on the differences in colors. I believe there is an old post of Rick Gerard somewhere that explains it in detail, but the short version is that it splits the segments at the edges of colors red, green,blue,yellow,magenta and cyan. if those are not pure colors, it will use a threshold to determine which pixel belongs to which segment.