painting in Photoshop

N
Posted By
name
Jan 29, 2008
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491
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Hi.

In Photoshop there is a difference between the way paint interacts with the current stroke and previous strokes. So if you draw a loop and you cross the line where you started out, the paint interacts with it in a different way then if you draw over previous brush strokes. This is counter intuitive, because in reality, if you use paint it doesn’t make any difference whether or not you paint in a single or multiple strokes as far as the way the paint interacts with paint on the canvas is concerned.

I’ve uploaded a short clip on youtube to illustrate my point, because it’s a bit difficult to explain it in words:

http://www.youtube.com/watch?v=4d7lYtU3fzg

If anyone knows of any plugins that can circumvent this issue or perhaps knows of any other software that allows you to paint where this issue doesn’t occur, I’d like to hear about it.

Comments or suggestions are appreciated, kind regards, Niek
Related Tags
paint

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J
jjs
Jan 29, 2008
"sobriquet" wrote in message
Hi.

In Photoshop there is a difference between the way paint interacts with the current stroke and previous strokes. So if you draw a loop and you cross the line where you started out, the paint interacts with it in a different way then if you draw over previous brush strokes. This is counter intuitive, because in reality, if you use paint it

Try layer mode as COLOR.
N
name
Jan 29, 2008
On 29 jan, 02:31, <jjs> wrote:
"sobriquet" wrote in message

Hi.

In Photoshop there is a difference between the way paint interacts with the current stroke and previous strokes. So if you draw a loop and you cross the line where you started out, the paint interacts with it in a different way then if you draw over previous brush strokes. This is counter intuitive, because in reality, if you use paint it

Try layer mode as COLOR.

Doesn’t make any difference as far as I can see (setting either the layer mode to color or the brushtool mode to color).
J
jjs
Jan 29, 2008
"sobriquet" wrote

In Photoshop there is a difference between the way paint interacts with the current stroke and previous strokes. So if you draw a loop and you cross the line where you started out, the paint interacts with it in a different way then if you draw over previous brush strokes. This is counter intuitive, because in reality, if you use paint it

Are you speaking of additive color? Regardless, Photoshop is not painting.
R
ronviers
Jan 29, 2008
Hi Niek,
What appears to be happening is that each lift of the brush is treated as a separate layer. This can be demonstrated by first creating three transparent layers, and a threshold layer placed above them. Then select a color of middle gray and set the brush mode to linear burn. Then on the layer below the threshold layer make the single crossover stroke then make the lifted crossover stroke. Then on the next layer down make a stroke then a crossing stroke on the bottom layer. Then set the layer above the bottom layer to linear burn and you will see identical results. I do not know why PS behaves in this way or how to change it but maybe this will help in some way.
Here is a screen cap showing the results of the test.
http://picasaweb.google.com/ronviers/MayaQs/photo#5160981543 002723282 You may need to use the ‘Download Photo’ link to the right of the image.

Good luck,
Ron
N
name
Jan 29, 2008
On 29 jan, 20:29, "" wrote:
Hi Niek,

Hi Ron,

What appears to be happening is that each lift of the brush is treated as a separate layer. This can be demonstrated by first creating three transparent layers, and a threshold layer placed above them. Then

What do you mean exactly by a threshold layer? Is is just another transparent layer on top?

select a color of middle gray and set the brush mode to linear burn. Then on the layer below the threshold layer make the single crossover stroke then make the lifted crossover stroke. Then on the next layer down make a stroke then a crossing stroke on the bottom layer. Then set the layer above the bottom layer to linear burn and you will see identical results. I do not know why PS behaves in this way or how to change it but maybe this will help in some way.
Here is a screen cap showing the results of the test.http://picasaweb.google.com/ronviers/MayaQs/photo#51609 81543002723282
You may need to use the ‘Download Photo’ link to the right of the image.

I see the image, but I don’t see exactly how it relates to the issue at hand. It isn’t
a screenshot from photoshop it seems and I’m not really familiar with maya (if
that is the application in the screenshot). I use a wacom tablet btw for drawing.

Good luck,
Ron
R
ronviers
Jan 30, 2008
Sorry about that I have no idea how that happened. Here is the correct link:

http://picasaweb.google.com/ronviers/MayaQs/photo#5160981543 002723282

If you get anything but a PS cap then just click the next slide button until the PS cap comes up.
R
ronviers
Jan 30, 2008
I wanted to mention that I use a Wacom tablet also and I think when you see the layers palette on the right side of the screen cap the threshold question will become clear.
N
name
Jan 30, 2008
On 30 jan, 01:45, "" wrote:
Sorry about that I have no idea how that happened. Here is the correct link:

http://picasaweb.google.com/ronviers/MayaQs/photo#5160981543 002723282
If you get anything but a PS cap then just click the next slide button until the PS cap comes up.

Ah ok, so it’s a kind of adjustment layer (the threshold layer). I’ll have to experiment a bit more with that
to see what it does exactly..
Someone in another newsgroup also pointed out I probably didn’t have the brushsettings
set properly to achieve the effect I was after (setting the pen pressure to flow, rather than opacity control
for instance). The following graphic kind of explains the difference between flow and opacity somewhat:
http://www.mambo.net/cgi-bin/TempProcessor/view/159
R
ronviers
Jan 30, 2008
I learned a lot both from the question and the link.
Thanks

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