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+--- Thread: Scatter brush? (/Thread-Scatter-brush)
Scatter brush? - grit - 12-10-2017
How to make shapes appear without angle tilt and without overlap ?
RE: Scatter brush? - rich2005 - 12-10-2017
You can change the random angle but overlap to a certain extent depends on you.
You need to edit the brush dynamic Dynamics Random Not possible with the stock dynamic since it is write protected.
First open the dynamics dock Windows -> Dockable Dialogs -> Paint Dynamics
[attachment=1080]
In the list find the Dynamics Random entry, Right Click and Duplicate as (1)
That opens up the editor with Opacity, Size and Angle 'ticked' untick Angle (2)
To help with the overlap down in the Brushes dock, increase the spacing to more than 100, say 130 to 150. (3)
That will space things out but up to you to miss previous work.
RE: Scatter brush? - Blighty - 12-10-2017
(12-10-2017, 01:25 PM)grit Wrote: How to make shapes appear without angle tilt and without overlap ?
1.
You have dynamics set to Dynamics Random. This has Opacity Random; Size Random; Angle Random. If you click the little icon to the right of the Dynamics field it will bring up the Mapping Matrix where you can see this.
You will need to create a new dynamic with just Opacity Random; Size Random. Ask again if you don't know how to do this. (It isn't difficult)
2.
You have brush spacing set to 20%. This causes overlap. Set to a higher value say 100% or 150%.
RE: Scatter brush? - Ofnuts - 12-10-2017
Make a copy of the "Random" Brush Dynamics (or create a new one) and remove the randomness on the rotation (in the "mapping matrix", un-check the box which is at the intersection of the "Angle" line and the "Random" column).
No way to tell Gimp to avoid overlap if you make random strokes by hand. It is possible to create a script to do random brush strokes (I did some thin like this in the past) and check for overlap after each stroke, but this would be quite slow (the bigger, the image, the slower). If is also possible to write a script to paint random squares of random size and avoid painting in a area that is already painted (somewhat more efficient).
RE: Scatter brush? - Espermaschine - 12-10-2017
Just for the sake of information:
you can use the Spray Tool in Inkscape if you are absolutely in need of no overlap.
EDIT:
wait....you said without angle tilt ?
Theres a filter in G'MIC that does this. Its called Box Fitting (under Patterns). But it doesnt apply random shades of grey....
[attachment=1082]
...which can be fixed by applying the filter to a layer of Solid Noise and ticking the transparency option.
[attachment=1083]