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Mech

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JoseConseco
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Mech

Sun May 24, 2015 10:19 pm
Base painted in PaintStorm Studio, then finished in Krita. Made for weekly contest on max3d.pl
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Artmessiah
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Re: Mech

Mon May 25, 2015 7:46 pm
JoseConseco wrote:Base painted in PaintStorm Studio, then finished in Krita. Made for weekly contest on max3d.pl
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Nice stuff, but I'm curious, why paint base in Paintstorm and not just Krita? I tried paintstorm and it reminds me alot of corel painter which for me anyway was not exciting at all. Still, super awesome stuff man. :)


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JoseConseco
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Re: Mech

Tue May 26, 2015 9:51 am
thx, Artmessiah. I prefer paintstorm for organic painting/thumbnails just because of awesome blending brushes. Somehow Krita's blending engine is not as good as ClipStudioPaint or painstorm - after long fiddling with brush settings I managed to get some decent paint/blender brush but it was complex to setup, and still not as good as others. But for hardsurface/mech/ sharp looking speed paint I pefer kritas 'sketch' brush engine. It is awesome. It is bit hard to explain without images...


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TheraHedwig
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Re: Mech

Tue May 26, 2015 11:26 am
JoseConseco wrote:thx, Artmessiah. I prefer paintstorm for organic painting/thumbnails just because of awesome blending brushes. Somehow Krita's blending engine is not as good as ClipStudioPaint or painstorm - after long fiddling with brush settings I managed to get some decent paint/blender brush but it was complex to setup, and still not as good as others. But for hardsurface/mech/ sharp looking speed paint I pefer kritas 'sketch' brush engine. It is awesome. It is bit hard to explain without images...

Could you make examples of that? Because I have tried both programs, and am not seeing the difference. (Though I used clip studio more intensively than paintstorm).

That is, on the blending level. Krita does indeed have a anti-aliasing issue on the brush-dab for the colour smudge brush.
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JoseConseco
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Re: Mech

Tue May 26, 2015 8:00 pm
Round brushes with dulling seems to work ok. Previously it was bit hard to get decent color blender. But knife brushes show big problem in Krita blending engine:
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You can see unwanted variation in color and saturation
Using Lab color (below) model gives no color change but there is visible noise in opacity, even though I tried to increase pen pressure steadily
Image
PaintStorm (no color hue, saturatio variation), opacity is stable without banding:
Image


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TheraHedwig
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Re: Mech

Tue May 26, 2015 8:33 pm
Ah!

1. The noise you're seeing is because there's noise in the brush-tip :)
2. The colour issue is indeed a bug. What is going on here is a rounding error, and you should probably report it. The rounding error disappears in 16bit, hence I know :) Gimme a call when you've reported it, then I can add a test file and more technobabble to it :)
3. Opacity in the colour smudge brush is more like flow in the other brush-engines. If you want to have a smooth transition have the color rate be set to brush pressure and the smudge length very strong, it also helps to have a little smudge radius for evening out the stroke(but not too much). I made a brush preset for you here: https://share.kde.org/public.php?servic ... 5ef7bcf6f5

EDIT: Looking at it, the brushes from my painting pack, while not as polished as the one I gave you, they don't have the hue-error due to way they use the smudge value and opacity value. This does make the brushes not very pretty, but I didn't have line quality so much as raw speed in mind when I made those.(Slow computer) (Also, I learned from this a trick to make one of them a lot more high quality :P )
EDIT2: If you want something more smudgy than the one I gave you, make the opacity curve more steep, it works pretty wel!
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JoseConseco
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Re: Mech

Tue May 26, 2015 9:25 pm
2. Ok reported here https://bugs.kde.org/show_bug.cgi?id=348267
1. I believe I used square tip, no jitter. The noise I speak of is visible as banding in perpendicural to stroke direction. I do not mind jaggy outline or bit of noise at edges.
3. Thanks for preset. I see what you did. But the way it is now it destroys everyghing below the stroke, so it is good for paint over but no good for steady, slow building up of form of object. When artist goes into detail usually you do not want to obliterate detail painted previously with this kind of strong brush. Anyway I noticed one thing:
- when I enable rotation - to tilt direction, in your preset it works ok (no banding)
- but then enabling pressure for 'smudge length' with linear curve ( f(x) =a*x) gives banding you can see in images above. If I disable pen rotation - banding is gone again.
So combination of pressure sensitive 'smudge length', and rotation along stroke gives wobbly results :(.
I do not like to compare software, but there are no this kind of problems in CPS, PaintStorm - no matter the settings. Maybe fixing bug mentioned in point 2 will help, but it is separate issue imo.

Edit: I lowered opacity thing you mentined in your Edit, and color is indeed more subltle, but high dulling is still destroying detail below stroke.
When I think about it now, my best guess would be that kritas 'color smudge' engine has hardcoded low flow walue that may give those dark bandings. So maybe setting flow to 100% would fix it.
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TheraHedwig
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Re: Mech

Tue May 26, 2015 9:55 pm
That is... sorta a missing feature, but at the same time extremely complex.

What is going on is that painting mode of the colour smudge brush is the same as 'build-up' in the pixel brush. Krita's colour smudge brush samples from it's own stroke, and HAS to, because otherwise the smudge variation won't work. That's why you are seeing the banding. You can make a wishbug for this wash mode to be added, but it is really complex so no clue when it'll be addressed.

Yeah, your edit: Krita's colour smudge brush relies on flow and doesn't use 'wash opacity' due to this reliance.
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JoseConseco
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Re: Mech

Tue May 26, 2015 10:24 pm
I tested paintstorm some more, and :
- opacity in PaintStorm = flow in Krita
- transparency in PSS = opacity in Krita
So yep it is basically wash mode with high flow that makes PaintStorm brushes work smoothly.
How about separating Dulling brush engine from Smudging brush engine? Would it be simpler?
Anyway, Krita is awesome, and it is not that big deal - there are many other great features in krita that kick ****!. thank for your time


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halla
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Re: Mech

Mon Aug 17, 2015 1:33 pm
Hm, no... Splitting the color smudge brush into two engines is not going to be easy...


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