now this is a quick and easy one...
instead of using alpha or so you can directly drow your stencil
1- push lasso tool
2- hold shift+ctrl ( thanks "sire" for remenbering me of that one on the edge loop post! will not happend again )
3- draw like making a poly selection
4- realize shift+ctrl; it s look like you are making a mask, but when you stop... INSTANT STENCIL!
and a littel Zscript recording for the road... because a Zscript worth 1000 pictures...