The "real" mural will be done with paint in the pointillist style rather than tissue paper, and will be installed permanently in the school library. We decided to make the grid angled 45° in homage to the Big Emma piece by Chuck Close. Our reference photo is of a biome (naturally), and one that all of the students have experienced in person.
The mural was originally divided into individual sheets of twelve squares. Students chose one square to copy with painted dots. No one was allowed to do more than one square per sheet. Further into the project, we began to run out of sheets, and the remaining sheets were cut in half to accommodate more students.
Though labeling the squares correctly with number, letter, and directional arrow is essential for accurate placement, it still eludes many students. Squares are now turned in along with the original reference grid so the accuracy of both paint colors and labeling can be checked before the source is removed from the art.