> From: bgw <[EMAIL PROTECTED]>
> How does "draw with transparency" differ from using eraser tool
> with x% opacity?
Pencil and eraser are counterparts of course, but I wished for
transparent color, not just transparent pencil (yes, it exists, and
it is eraser).
> From: Chris Moller <[EMAIL PROTECTED]>
> Doesn't the Eraser Tool do what you need?
Yes and no, see above.
> (Though maybe some
> interesting effects could be gotten with an erasing airbrush that
> accumulated in the alpha channel.
Exactly! Because once you have transparency as your color you could
use any tool which works with colors.
> From: Simon Budig <[EMAIL PROTECTED]>
> Well, historically new stuff always had to proove that it is better
> than the old stuff and I personally don't think that is a bad
> So how do you want to work with transparency? What should happen if
> you have a semi-transparent red and you paint on top of blue?
Good example, because it shows how natural transparent color is. The
answer: you should get exactly the same effect if you have blue color
and paint on top of semi-transparent red. It depends on mode and used
> Currently it gets blended on top of the blue resulting in some kind
> of violet and that is a widely used feature to do natural looking
> paintings. I understand your proposal, that you actually want to
> have a semi-transparent red in the image after painting?
Both answers are really correct -- see above.
> How is your new feature supposed to interact with tablets with
> varying pressure devices like tablets? Right now you can map the
> pressure information pretty naturally to the opacity. Your
> "replacement" approach for alphacolors would directly influence the
> images alpha channel, making it pretty tricky to lift off the pen
> without leaving a transparent spot (tablets tend to add some events
> at the end et the stroke with very low pressure).
I don't understand that paragraph:
a) the transparent color is not a replacement, I clearly stated this
in original post, it is addition to the color palette
b) don't pick the transparent color if you don't need it
> How is your "replacement" approach supposed to work with multiple
Again, it is not a replacement.
Honestly, I didn't thought of this issue -- it can be done, but to
achieve intuitive behaviour it should be well designed not to change
too many things. So here is the problem now... pity.
> From: David Odin <[EMAIL PROTECTED]>
> So your wishes are granted too. There are already tools for that
> in the gimp toolbox: eraser and smudge.
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