61 Visual Effect Fabrics 61

The weave of the fabrics is also important

The viewing distance in relationship to the opening size of the weave

1 Gauzes/bobbinets have a honeycomb weave pattern that make them very transparent. They also take less of a projected image due to their open weave. However, because of the open weave, the transition to "transparency" works quite well. One important aspect to keep in mind is that due to the open weave, the structural integrity of the fabric, especially in large full stage sizes, is compromised and a large amount of unpredictable stretch within the fabric can happen in the form of "hour glassing" at the sides and "smile" or "frown" at the bottom edge.

2 Sharkstooth scrim has a tighter weave pattern that is favorable for a better projection quality compared to vision gauzes/ bobbinets. However, due to their higher density, they tend to not "disappear" quite as well as gauzes/bobbinets, but still make a convincing effect. One of the benets of using sharkstooth scrim over gauze/bobbinet is that it is a more stable fabric and usually hangs much nicer in a full stage environment.

3 In addition to gauze/bobbinet and sharkstooth scrim, cine gauze is also available to create the same effect in a close-up viewing situation.

Moiré effect on scrim and netting

Most projectors produce moiré effects on the scrim and netting in unattering ways. Most of the time, however, these moiré effects occur at short throw projection distances or at a very high resolution.

Installation of projection fabrics

For a crisp, clean image projected onto a fabric, you must make sure fabric is in the correct bre direction and has as few visible seams as possible. Irregular stretching of the fabric can also lead to an inconsistent image, as well as wrinkles or material changes due to improper handling or storage. Small changes in the bre structure, such as moisture or pressure points, can also signicantly affect the quality of the image.

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