Lightbox Woes

Howdy!

I made a new lightbox, since mine got tossed in the move, but I'm not entirely in love with it.  I don't think the pictures are coming out as nicely as they were with my old one.

This one I cut three sides out of a cardboard box, leaving about an inch border on the sides.  Then, I covered the sides with tissue paper and cut a piece of poster board for the back and bottom.  Ducky worked very had on helping me make the one.  My old one was made entirely out of computer paper.

I would love your opinions on how the pictures are looking.