We have done these collaborations in a few places...each time experimenting with different elements. Of course we always use projectors...but also plastic bags, insect wings, thread, old plastic bottles, water, soda, inks, soap, oil, etc. We encourage you to try this...but be prepared to spend hours doing it because some exquisitly beatiful imagery happens and it gets addictive as you'll want to experiment with more and more items.