Well, I’m following the tutorials on the pixologic site (i’m on the sword one). In the video, when the mask is drawn on the plane, it comes out as a very dark and shapr looking square (just like the alpha). However, whenever I try it it looks much liter and blurrier and I can never achieve the effect the tutorial has (making it as you can imagine, follownig the tutorial rather troubling). Any help is appreciated! 
Here’s how it looks in the tutorial:
http://img189.imageshack.us/img189/1683/screenshot005iu.jpg
And here’s my sad attempt:
http://img704.imageshack.us/img704/2448/screenshot004cs.jpg
