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brush curve profile

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madsculptorishere
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brush curve profile

Thu Sep 13, 2012 4:00 am
Hi all.

Just installed Krita to see if it will let me edit the brushes the way photoshop won't.

It looks like it will be quite nice to start if I can find a way around the following issue(not a bug, probably a feature request):
Image

Here you see the start of the stroke with opacity set to get higher as more pressure is applied. The size is set to get thinner as more pressure is applied.

It's exactly what I'm looking for until I get to the end of the stroke and lift the brush. As you can see, there's a large brush mark at the end of each stroke.

Is there a way to get rid of this 'tail/tip'?

The only way I've seen to get around this is to keep the pressure at max at the end of the stroke and then drag off screen.
I think this is caused by slight wiggle when I lift the brush off the tablet at the end of the stroke because I can minimize that mark quite a bit with certain wrist movement.

Thanks
valerievk
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Re: brush curve profile

Thu Sep 13, 2012 5:31 am
This may be a bug and I think I saw a similar problem somewhere in this forum, but I can't find it back right now.
I think the solution was to adjust the curve at the end so that it wasn't a straight line down but something like this (the second curve):
Image

This compensates for the wriggle at the end.
madsculptorishere
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Re: brush curve profile

Thu Sep 13, 2012 10:34 pm
Thanks, I haven't been able to get the effect adjusting the curve profile.

I looked through this section of the forum for the other post you were mentioning and couldn't find it.
Do you remember if it was in another sub-section?
valerievk
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Re: brush curve profile

Fri Sep 14, 2012 5:56 am
I'm not sure, I can't find it either... I may even be confusing it with something else.

Come to think of it, the "flat" end should be the lower end, not the upper end, my bad. The idea is to make Krita consider a relatively light pressure as "no pressure", so it won't detect the dot at the end. If fiddling with the settings still doesn't work though, then I'm out of ideas.
madsculptorishere
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Re: brush curve profile

Sat Sep 15, 2012 4:48 am
I figured that's what you meant. Same issue, it controls shortens/lengthens fall off on strength/opacity but still generates the mark.

I'll mess around with wrist angle more. Thanks for your thoughts.
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JoseConseco
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Re: brush curve profile

Sat Sep 15, 2012 10:08 am
I had similar problem but in reverse. I had this dot at begining of stroke. Easy fix; viewtopic.php?f=139&t=107138


madsculptorishere
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Re: brush curve profile

Mon Sep 17, 2012 11:27 pm
Thanks for the response.

It's not working how intended. This is strange:
When I set the curve like yours(I set 0 at about 80% of tablet pressure to make the appearance more obvious), I don't have to lift the pen off the tablet to get the dot at the end of the stroke anymore.

To be clear this isn't user error rather than a bug: Setting the end of the pressure curve to 0 means it will read from that point on the curve onwards as no input, correct?
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scummos
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Re: brush curve profile

Mon Sep 17, 2012 11:35 pm
madsculptorishere wrote:Thanks for the response.

It's not working how intended. This is strange:
When I set the curve like yours(I set 0 at about 80% of tablet pressure to make the appearance more obvious), I don't have to lift the pen off the tablet to get the dot at the end of the stroke anymore.

To be clear this isn't user error rather than a bug: Setting the end of the pressure curve to 0 means it will read from that point on the curve onwards as no input, correct?


It's definitely a bug and the curve thing is a workaround to minimize its effect until the problem has been fixed. The problem seems to be that some program detects full pressure for a very short time. The proposed fix is to set the absolute maximum pressure to zero intensity in krita, which will fix this issue but introduce the problem that you'll get nothing if you *really* apply full pressure to the tablet. However many people rarely do this, and thus won't notice.

Greetings


I'm working on the KDevelop IDE.
madsculptorishere
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Re: brush curve profile

Thu Sep 20, 2012 8:55 am
I think I see what's happening with the last workaround.
Setting full pressure to read as 0 puts the brush on a loop so when you press down fully it reads as if you lifted the pen off the tablet but as soon as the pressure starts to lighten from lifting off the tablet, the tablet reads that lightening pressure, say 50%, and assigns your stroke to it.

Actually, it happens with default pressure curve also so I guess it doesn't really have anything to do with that curve?

It's kind of cool as I can start and end multiple strokes without having to lift the pen off the tablet at all.

That is with the tablet pressure curve though.

I can definitely minimize the tail if I use that curve on the brush settings instead but your brush sensitivity band gets much smaller.
You can cut it out altogether if you don't set size to be pressure sensitive.

Any idea when we'll get to see any change to 'correct' for this?

thanks for reading.


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