Get a brush effect bigger than 2500px?

drw158

Hello, I like to make my own brushes and such but I need to cover a 10" by 10" 300dpi canvas with a single brush. Currently, the brushes cannot go larger than 2500px. So how can I get the brush effect (removes all white pixels to transparent)?

I make brushes out of scans from old paper, so there is no need to move the brush once I click.

I have tried messing with the layers modes, but none seem to do the trick. I have also bitmaped the brush material (old paper scans), with a diffusion dither to convert it into a halftone image in order to place a color onto the bitmap, but I'd rather not do that. I'd rather keep the material greyscale and not convert it into black and white pixels.

thanks!

here is a link to an example of my work. As you can see there is a slight paper texture in the black background. I used a brush, but since this is a 10" by 10" image 300dpi, a brush cannot fully encompass the whole canvas. What you is a bitmapped and dithered greyscale paper texture in the background ( i don't want to dither it. I want it to be fully greyscale but in another color besides black)

[url]http://www.flickr.com/photos/davewhitley/4358173169/[/url]

Auieos · Posted: Tue Feb 16, 2010 6:10 pm Post subject:

I like your art. Can i ask why its so important to have the paper applied as a brush effect?

drw158 · Posted: Tue Feb 16, 2010 6:41 pm Post subject:

I just don't like the idea of converting the paper texture into a black and white dot pattern(and not having an anti-alias effect). Since there are so many ways of doing a single thing in photoshop, I feel there HAS to be a way to do it and I just don't know how. So its kind of like a defeated feeling. But getting back on track, it seems like something easy to do, but I'm just not seeing it. Like you could "select color range" and select a range of white values, but that's a roundabout and not as effective way.

Auieos · Posted: Tue Feb 16, 2010 7:10 pm Post subject:

drw158 · Posted: Tue Feb 16, 2010 7:43 pm Post subject:

[quote="Auieos"][quote]I just don't like the idea of converting the paper texture into a black and white dot pattern(and not having an anti-alias effect).[/quote]

Im still having trouble trying to picture where black and white dots come from in a colour scan.

1. I have a color scan of the paper texture.
2. I convert to grayscale and adjust the levels slightly
3. I go to mode>bitmap>diffusion dither. This convert the grayscale image into tiny black dots (no gray values or anti-aliasing).
4.Finally, I select all the black dots using the magic wand tool and the "contiguous" box unchecked so that it selects everything that is black.
5. Now I can place any color onto the selection, and it looks like it has a full range of values, but it is actually just a halftone pattern effect (there is no actual grey values, only black)

[b]note to others looking as this--[/b] the above steps are something that I do NOT want to do, thanks

thanks again for the feedback

Auieos · Posted: Tue Feb 16, 2010 7:58 pm Post subject:

Understand that part now however still confused

Why all the fuss with brushes and selection when it reads like all you want to do is make the paper larger and change the colour.

drw158 · Posted: Tue Feb 16, 2010 8:41 pm Post subject:

Yes, basically all i want to do is change the color of the paper scan so that all the black and dark grey values (after changing it to grayscale) can be any color i choose. And what I've just described is basically what the brush tool does. It takes all the dark values and can change to any color I want. The reason why I want to do this is so that I can cover a high res canvas. As you can see in my picture on flickr, I want to be able to place the scanned paper over anything I want, so just simply changing the color of the paper won't remove any pixels and make them transparent (like the brush tool does).

hope thats clear,
thanks,
dave

drw158 · Posted: Tue Feb 16, 2010 8:43 pm Post subject:

Also: technically I don't want to make the paper texture larger. I already have a paper scan that is super large and will cover my needs.

drw158 · Posted: Tue Feb 16, 2010 8:47 pm Post subject:

Another way to think about it:

1. I want all the white pixels transparent.
2. I want all gray pixels semi-transparent
3. I want all black pixels to be any color i choose.

this is what the brush tool does.

sorry, this is hard to explain for me.

Auieos · Posted: Tue Feb 16, 2010 9:32 pm Post subject:

Its ok, no problem.

The easiest way is probably do what you don't want to do just change the steps a little.

1. I have a color scan of the paper texture.
2. Desaturate (Not Greyscale) and adjust the levels slightly.
3. Select > Colour Range > Select suitable amount of black.
4. Refine edge to adjust selection to suit.
5.Create a new layer while marching ants still active.
6. Edit > Fill > Select the colour to replace the black.

I hope this helps you. I know with art its always tricky because you need to get it looking exactly the way you want, not just close to.

*I ended up selecting the white not the black Dodgy

, but it works the same both ways because the colours are on different levels.

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