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rouncer

how do you apply a brush colour to an image professionally in an art program

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Simply averaging the colour on due to opacity is not how its done, I know this because im getting a different result.

Does anyone know how to do this professionally? or know where I could try and find out?

 

Ive looked up blend modes, but its not really what I need, cause I just want to know how NORMAL BLEND MODE works!

And this is never explained.

 

So its a method of opacity, I looked up opacity and they just blurted out the exact way im doing it, but its not the right way...

 

http://prosjekt.ffi.no/unik-4660/lectures04/chapters/Basic.html#tag1

Edited by rouncer

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ah success.   youve got to find the difference first! then subtract it,  but there might be more to it than that just yet, but im definitely closer...

do you get what i mean? you multiply opacity by the difference!!! its not all in one line.

Edited by rouncer

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You, uh, linearly interpolate between the two colors using the specified alpha?
layer1 + alpha * (layer2 - layer1)

EDIT: And, as you've probably seen in the FFP,
(layer1 * alpha) + (layer2 * (1-alpha))
Edited by InvalidPointer

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yeh, those 2 different operations are completely different, they give completely different results.   yes i know now.

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Yeah, it's actually the opposite. Just for completeness, it should be

 

(layer2 * alpha) + (layer1 * (1 - alpha))
 

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