Materials: 5 foam core boards packing tape (for fastening the foam core) about 2-3 yards white fabric from a sheet or drop cloth, whatever.. 1 large poster board. (must be flexible) 1. cut two of the foam cores into a square (save the excess to use as reflectors) 2. tape the foam core into a box. 3. tape the poster board to the back + bottom in a curve. 4. throw the white fabric over the top. This works best with an off-camera flash so you can experiment placing it in the cube, beside it, top, etc. Using a digicam is a great way to test lighting.