Hi raiden,
I've used my own photos on a primitive, I think the one with Leonardo's man or maybe a flattened box. I don't have bryce where I am right now. If no one else can give you better information, I will try later tonight or tomorrow to better describe what I do. I know that in the Material lab there is always a dot I have to fill in order for the photo to look right. Again, I'll check back later to see if anyone else comes up with better info for you.
Ang