Paint Brush Idea

[Bernard Bunner]

John, or other users, do you think it's possible to create this kind of paint brush ?

[liveart]

one more

pourbernard4ib.zip

[Bernard Bunner]

Thanks I'm also working on this, my one is a little similar to yours...

It's not yet what I hope, not the right direction It's a beginning.

Here in bigger size :

[liveart]

Ok  so I returned to this challenge this morning. I see a particular difficulty in re-creating the original look in a single preset. In the original some of the strokes are curvy and fluid and some are straight and staccato.

This will require at least 2 presets (or implementation of my idea of a special class of dual strokes that would have 2 presets in them).

anyway I modified the last of the 14 presets posted above adding John's suggestion of gradient modulation.

here is the result of running that preset with the path shape panel open while it was running and adjusting the stylize effect from none - to straighten lite - to reduce 1 straight while the preset was running.

The slight cheat is that I went in after the run with a selection of the face- erase to white, draw some bezier lines and cmd-k painted these with the same preset modded to have a smaller brush using the "b" hotkey.

for a work that is 98% auto run on one preset... not bad result I think.

[liveart]

here is the preset. Remember I varied the path shape in real time. Path type :: curved :: stylize effect:: variable.

pourbernard4kmod.zip

[liveart]

straight only

curve only

Mixed without fixing the face

[liveart]

John this example doe bring up a good point.

Several other "natural" paint programs make it easy to directly control the brush "dryout" maybe that could be added as a parameter to paint fill apply?

[Synthetik]

Another paint effect related to dryout is emulating the paint on the brush getting dirty as you move it. You can use the Path Gradient controls in the Paint Color Modulate control panel to emulate that. Setting the Gradient End to the Canvas option for example, and using the Path Length option for the Path Gradient.

[Synthetik]

Path Length or Inverse Path Length modulation is the typical approach you can use to add a dry out. Or pressure or tilt modulation if you want to have it be interactive. Where you turn that on is a function of how the paint preset is programmed.

There are a lot of different parameters you could potentially modulate to add a dryout effect. Blend in Paint Fill Apply being an obvious one.

But, if you are using a Procedural Texture Brush Type, then you can modulate the Clipping. Or, you could be using luminance modulation in the Brush Modulation control panel, which modulates the brush luminance with the Background Texture. So that could be another approach. Modulating a texture field to build the dryout is going to have a very different look and feel from just modulating the blend, and will better reproduce a bristle dryout effect..

[liveart]

the issue with using the Brush Modulation panel Lum modulation :: texture energy or inv Texture energy is that it effectively limits the fade out to certain areas of the canvas, not just to the last n% of the stroke.

Even using Lum Mod :: Path Length :: background texture does not produce a genuine feeling of paint running out .

Maybe varying the transparency by path length? I have tried for this effect before and never been quite satisfied.

There are work arounds.. and of course trying to make an SA brush behave like a Painter or Artrage Brush is a folly. There is most certainly a way to get the effect in the finished look if not in the brush stroke.

As a bit of a general suggestion Bernard, the over all look is probably going to be best found using bezier strokes and cmd-K painting.

[Synthetik]

I'm not sure what you mean by certain areas of the canvas not fading? Associated with the background texture?