Christine Trench from Gateway Alliance Church in Edmonton, Alberta, Canada brings us these squares with leaf veins inside.
They built the set using sheets of 4×8′ plastic cardboard from Home Depot (costing $16 each). They used black electrical tape to create the vein pattern on the sheets.
They put holes in each corner of the plastic then used long cables ties to connect the boards together and hang them from the ceiling. They added some black electric tape around the cable ties to make them strong enough to hang.
Then they used 40lb fishing line (camping, outdoor stores) to pull the panels back by around 8 ft and attached them to the rafters to create the bow affect. Finally they finished it off by lighting the pieces with LED bars.