Re: [Gimp-gui] GIH and GBR grayscale brushes as subset of RGB raster brush



Hi All,
I have made many tests with all precision of current GIMP and is possible to use RGB brushes with color paint dynamics (must be studied which is ideal... in general all parameters transforms a RGB brush a grayscale brush). The tests are demonstrated that the linear light is better for all precision, the painting experience performance is 2.5 faster in median than obtained with others options. I am very curious and interested to study the possibilities of RGB brushes because we can use them to obtain many effects when used as RGB brush (stamp) or as Grayscale, both based in the same stain. The versatility of the possibilities to use them could are hugely amplified... normal painting issues and impasto how I have already demonstrated using RGB brushes with clone tool, is only a example. The possibility of the expressiveness on the different painting styles will be increased with this new possibility... now we have a good implementation of the clipboard to work RGB brush. For this scope, I will write articles on gimp.org about raster brushes and mainly about the hidden possibilities of RGB brushes.

On 3/3/19 12:22 PM, Americo Gobbo wrote:
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
_______________________________________________
gimp-gui-list mailing list
gimp-gui-list gnome org
https://mail.gnome.org/mailman/listinfo/gimp-gui-list



[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]