I just did my biggest Royal Icing transfer this past weekend. It was a Batman cake for my nephew. I had the picture enlarged and also in a mirror image where you are working on the back of the image and then flip it over onto your cake. You don't have to do it in the mirror image if you don't want to, I was just going by the BC transfer tutorial here on CC. If you do it in the mirror image, it will be flat on top instead of the pillow effect. I did mine on wax paper-I didn't think about parchment paper, but it seems that would make it easier to come off because mine broke in 3 different places while I was trying to get it off of the paper. Once I got it on the cake no one could tell but me. As Jrae33 said they are VERY easy to break. Use a thin consistency for outlining-I used tip #1, but after I did it I was thinking I probably should have used tip #2 to show the details better. Let it dry (doesn't take long to dry), then use a thinner consistency for filling in. I used a long thin pin I had to fill in corners-just fill in with icing, then use pin to "guide" icing to edges and corners to make sure icing gets in the specific spots. Let it dry really good-I just let mine dry over night, but now I'm thinking it probably should have dried longer and maybe would not have broken so much-be very careful taking it off of the paper, then tranfer it to your cake. Since my cake was crusted over, I used tip #1 and squeezed buttercream icing all on the back so it would stay. I wasn't sure if it would slide or not. Sorry so long, just trying to help!