I got a bit tired of not having tearable cloth in H13, so I decided to have a go at creating my own tear solver. This is quite basic, just measures a polygon's rest area vs. its deformed area and creates a tear based on that threshold. (Check the "group_breakme" node inside the sopsolver to see the tear threshold) I also decided it was best to pre-fracture the geometry so I could get nice, art-directed tears.
Just posting this in case anyone is needing a solution. If anyone knows a simple way to spice this up or make it more correct, let me know.
-Adam
ClothTear_V01_01_as.hip
ClothTearSolver_01.mov
ClothTearSolver_02.mov