Ok,
I created a sketch that i wanted to import into zbrush so i could map it onto a plane and sculpt the detail. then grabdoc to use the alpha as a stamp.
What i did was create a plane in maya and UV map it. I lined up the drawing to the UV map of the plane in photoshop, then using GoZ i exported that plane to zbrush and imported the file with the drawing as a texture to use as a guide. Everything looks and works fine so far.
using the guide drawing, i mask it off by outlining the sketch and filling it in, but when i go to create the alpha out of the mask, all i get is either a full white or full black alpha.
I even tryed filling in with black and white and making a new texture from polypaint, but i get the same result; black or white file.
What am i doing wrong here?