what I do is grab the eyelashes then in the materials I select an empty slot for the transparency in the top part of the dials, and also in the bottom part,this opens up a new texture b or c or whatever. Then in that open the parametric texture up. I load the same texture into a new empty box and load the transparency image in the alpha channel, hit the green tick and make sure the texture is set to blend transparencis (the arrow on the beside the texture boxes up the top) . It works for me.