I made this one to test the hatching brush engine :


Creative commons by nc nd

(I draw each darkness level on separate layers, and without the "pressure to hatching level", to get a better control.)

Woo!. Excellent work there. Thank you for your dedication to help us test Krita . So my turn came for people to use my brush engine, and I feel all awkward now.

Obligatory questions:
1.- Was the engine fast enough for you?.
2.- Was the UI confusing?.
3.- What options did you miss in the GUI for it to be more useful?.
4.- Is there any feature you wish the engine supported? (anything that comes to mind works).
5.- Was there any behavior in the brush that annoyed you?.

Also, I'm puzzled on how you managed to avoid the little artifacts that generate in the hatching when the hatching is done in a small scale (small width or separation, and I still can't come up with a good solution for that), so I assume you made an image that's actually x2 times as tall and wide as the one displayed here and then shrunk it?, or did you find another workaround?.

Thank you again!.
Have a most fine day.

I'm glad you like it!

so for your questions:
1-Yes I found it fast enough, only with very big brushes (like between 500 and 1000 pix) it lagged too much.

2-UI is very clear to me, no problem to understand how it works.

3- THE ONE THING I'M MISSING (!!!!) is a shape mode, where you can actually trace the contour of an area and it's filled with current hatching (set at full pressure) when release the pen, to get strictly regular areas it would be very handy (because even with full opacity/no pressure variation or edge blur settings I got small variations/superpositions when drawing over an area already drawn) also it would enhance productivity/draw faster with it.

4-I think the above answer is for this one too.

5- The only annoying thing is the one I told above, that when drawing over an area already drawn (in a previous stroke) it makes the lines a little thicker so it breaks the regularity, so it's best to do "one-stroke" shapes.

The scale of the original image is 2000x2000px. I used maximum small width (1px) I'm not sure I see the artifacts you talk about, but they probably are there if you say so..

3 could be solved by creating a selection and then painting with a brush bigger than the selection (If I understand that correctly). Looks like hatching brush doesn't use selection at the moment.

Yes I forgot to say this, thank you for pointing out ! Using selection could do the trick on this (even if a toggle setting to auto. do this would enhance productivity a lot) but sadly Hatching brush currently isn't aware of selections.

Animtim wrote:5- The only annoying thing is the one I told above, that when drawing over an area already drawn (in a previous stroke) it makes the lines a little thicker so it breaks the regularity, so it's best to do "one-stroke" shapes.

The scale of the original image is 2000x2000px. I used maximum small width (1px) I'm not sure I see the artifacts you talk about, but they probably are there if you say so..

Actually that slight thickening you mentioned is what I called "small artifacts".



I'll add these things to my TODO for when GSoC is over. Thanks for your feedback!

Pentalis wrote:Actually that slight thickening you mentioned is what I called "small artifacts".

Ok then I see the artifacts, it's more clear to me now

Also one thing I've missed to use pressure control on hatching:
a toggle to get linear curve on the pressure-curve, doing straight lines between nodes, to get some stair steps, then it would be easier to control 2 or 3 hatching levels (like low-medium-hard) with pressure.
(I tried but didn't manage to get this as I want with current curve behavior )

Just a small post to let you know I fixed the selection bug, now the brush respects selections.