I've gone through all of the documentation and been fiddling around with this modifier for an hour. Can someone tell me how it works? What is it actually doing? My understanding right now is that it mixes different weights (which you set by vertex groups) and I understand all of the blend modes and what not). Essentially, I understand a lot of what it's doing but I can't wrap my head around this problem. In the vertex groups you set a weight for your vertex group and then in this modifier you have an A and a B group and you set default weights for the A group and the B group. What is the interaction between these different weight settings? How does it work together? Also, how would you use a texture map on this (I looked up the blender post for this at Remove vertices based on texture but couldn't figure it out).
Thanks so much for the help!