Anonymous asked: "Howdy.......how can I avoid lumps and bumps from the paper bunching up around curves under glass?"
Armed with a little knowledge about glue under glass, suddenly we are talking about how to make paper (which is flat) mold itself to a glass under-surface that is NOT flat.
Yes, darts. If you're making anything with fabric that needs to shape around a curved mother-in-law, you never think twice unless, of course, you think twice about how many darts you are going to have to cut to create the garment to fit the creature.
Paper is just a bit more tensile that fabric. So, cut darts where you need them. Hide them miraculously along the lines of leaves or a flower petal or some other line in your artwork that will overlap whatever is next to it.
And, use a little extra glue. It helps fill in the space between the curved glass and the flat paper.
You can also deal with the "overlaps" by simply cutting and using smaller pieces of artwork as in this project demonstration by Kjara.