12-10-2017, 02:43 PM
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).
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).