large pinhole images in a very large pinhole camera (like a room, a truck or caravan, or ...).
Would be nice if it could be Ilford Direct Positive paper:
- Sticking paper on the wall
- expose by opening pinhole for several minutes
- use sponges and buckets to develop and fix (while still hanging)
See for example Shaun Irving: The Camera Truck: http://www.wps.net.nz/featured/pinhole-camera-truck/ and http://cameratruck.net/Site/Landing.html
This is one of his images that inspired me: