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Lights through gauzes and drapes

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Mark Powell
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Hi all, I wonder if you can help:

I want to have a drape that light shines through, like a sharkstooth gauze. I have added a drape to my drawing and set transparency to anything from 50% to 90% but the light beams do not shine through it, they just light up the back side.

Is there a way of doing this?

What Im trying to achieve is to have lights concealed behind the gauze and only revealed when they shine through it.

Many thanks in advance.

John S Nichter
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Hey Mark,

Select the object. In this case, the drape, and in its Properties window, change Cast shadows to (No). This should help.

Best,
Johnny
Mark Powell
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Thank you John, this works well!

Cheers

Sirje Ruohtula
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Hello, following this, I made a black gauze from a curtain, which works quite ok. But the curtain still has wave length. I want to make a basic streched sharks tooth gobelin tull, but I don´t quite know how to. Should I use some other tool than the curtain?

SVF Lighting
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I suggest adding a regular cube form, and stretching that very thin across the surface you want it to be.
Works very well.

Sirje Ruohtula
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Thanks, Your gauze looks great! Testing now this and wondering for which are the best values for transparency, luminance, roughness and so on. Did You use any texture?

Sirje Ruohtula
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Still having problem about the gauze. If I make it say 30% transparent, it looks ok, but it should also cast shadow. If it does cast shadow, tha shadow is too dark. A real gauze transmits partly, and the shadow of the object behind is visible, and same time there is an about 50% shadow of the gauze itself. Somehow playing with tsis doesn´t quite become as I hope! If anyone has solved this, please give me a hint for a black sharkstooth gobelin tull = gauze!

Floriaan
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I once experimented with a texture image with alpha (transparency). This works sort of good. But I am guessing it takes a toll on the perfromance.

Floriaan Ganzevoort
Lighting Designer - Theatermachine