Re: [Gimp-gui] GIH and GBR grayscale brushes as subset of RGB raster brush
- From: Americo Gobbo <jag rabisco gmail com>
- To: Jehan <jehan girinstud io>
- Cc: gimp-gui-list <gimp-gui-list gnome org>
- Subject: Re: [Gimp-gui] GIH and GBR grayscale brushes as subset of RGB raster brush
- Date: Sun, 3 Mar 2019 12:22:10 -0300
Hi Jehan,
On 3/2/19 1:37 PM, Jehan wrote:
Not sure I understand your questions.
Grayscale brushes simply uses the foreground color (the brush pixels
are used as a mask) whereas RGB brushes won't be affected by the
foreground color. Most of the time, people want to make grayscale
brushes, though RGB ones have their interest. I guess you could use
them when you want to do more like some kind of images with fixed
colors (typically the green pepper joke brush is RGB for instance).
There may be actual use cases, like the other day, someone wanted to
make some brush with a fixed designs for image overlays. One possible
workflow could be to just make it as a RGB brush to have easy access
to it (of course other workflows could be to just keep the image in a
handy place and import it as layer, or to script the overlay adding,
or whatever else; no unique solution).
In the current GIMP version, perhaps since of 2.8, exists a hidden
feature to ability to use, on-the-fly, the color background in the RGB
brushes. If you enable 'Color' parameter on the paint dynamics is
possible transform a RGB brush a simple grayscale brush.
I am supposing that the paint dynamics is always enabled for any brush
present on Tool Options settings... for instance, if we have a 'No
Dynamics' enabled is saying only that the paint dynamics doesn't have
any parameter enabled inner.
I have some ideas and considerations how to use this feature to simplify
and apply the usage of RGB brushes, for instance:
1. Have on Tool Options the possibility to enable, via check button
e.g., the color parameter a hidden paint dynamics... the hidden paint
dynamics curves must be studied to use only the background color, for
instance.
2. In this way, we can use a RGB brush also as graycale brush... without
the necessity to create a dedicated set, for instance.
3. This approach could be interesting to simplify the brush set... where
in future, we could be use only RGB brushes.
Thanks,
americo
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