I have always used Katie's masks... when I want to change the size I just transform the shape to what I need and clip my picture on it.
Rounded Corner Clipping Masks Brushes - Photoshop Brushes DesignerDigitals
Hope that makes sense =)
__________________
 
My Camera - Canon 50D
My Lenses - 50mm 1.2, 28-135mm, 700-200mm f4, 24-70mm 2.8
My Software - Photoshop CS4, Lightroom 2, Noiseware
|