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Subject: Help needed with the DTE

Phantast opened this issue on Jan 02, 2004 · 4 posts
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Phantast ( ) posted Fri, 02 January 2004 at 4:33 AM · edited Fri, 16 August 2024 at 11:56 PM

Often I need a channel with a solid grey tone in the alpha channel. Using a procedural texture, I can set noise to nothing and get any colour I like in the colour channel, but the alpha is always 50% grey, and I may want 25% or 75%. How does one change the alpha output in such circumstances? I can do it by loading a 25% grey bitmap and copying it into the mask channel, but there must be a simpler way.

dan whiteside ( ) posted Fri, 02 January 2004 at 7:27 AM

You can use a filter like ABS and by moving the B value change the alpha channel from black to white. Set the A value to zero, then B =1 will be white and B=0 will be black. Is that what you were asking? Best; Dan

madmax_br5 ( ) posted Fri, 02 January 2004 at 7:41 AM

just set the filter type to clip ax+b

Phantast ( ) posted Fri, 02 January 2004 at 11:40 AM

Yep, that works great - thanks.

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