With over 25 different materials, Rosco offers the broadest range of diffusion available. A wide variety of effects are possible, ranging from the slightest "feathering" of a beam edge, to the creation of a broad shadowless expanse. Except as noted, all materials are 48" x 25' (122 cm x 7.6 m), sheets 20" x 24" (50 cm x 61 cm). Here are 12 popular diffusions, illustrating various diffusion effects.