Deif Lou adds:

i'm going to be busy tomorrow but i would appreciate if the team 
considered the (yet unfinished) task i'm making for the ps blending 
options + clipping masks + layer effects as project for the future, 
keeping in mind that those 3 are intertwined. Although they can be 
tackled separately, the underlying layer rendering stuff is common for 
the 3. It would be nice to know what you think about that