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Driving light intensity with lightness of another layer ?

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Pascal Desfoux
Driving light intensity with lightness of another layer ?
on Jan 24, 2007 at 7:04:14 pm

Hi guys,

I would like to drive a light intensity with the lightness of another layer.
Think about one layer with a "lightning fx" & a second one with clouds in 3D & a light illuminating the clouds layer. So any time you get a lightning strike, the light illuminate automaticly the clouds layer.
I've tried with an expression, linking the light intensity to the "level fx" of the lighting layer (RGB or ALPHA), but it doesn't works !
Any idea ?
Do I need a special plugin to be able to analyse the lightness of the lighting layer ?
Thanks in advance for your help.
Pascal




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Mylenium
Re: Driving light intensity with lightness of another layer ?
on Jan 24, 2007 at 8:44:03 pm

[Pascal Desfoux] "Do I need a special plugin to be able to analyse the lightness of the lighting layer ?"

Yes, you do. Digital Anarchy's Anarchy Toolbox, Color Sampler.

Mylenium

[Pour Myl


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Pascal Desfoux
Re: Driving light intensity with lightness of another layer ?
on Jan 25, 2007 at 9:48:55 am

Thanks Myl for your prompt reply.
In fact I own Anarchy Toolbox from a lot, but never thought to use the color sampler fx in this way. I'll try asap.
Thanks again & have a nice day.
Pascal



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