Join John Derry for an in-depth discussion in this video Changing the thickness of the bristles, part of Photoshop CS5: Painting with the Mixer Brush.
Thickness controls how fat your bristles are.…I like to think of it like dried paint within bristles.…This dried paint bonds many of the individual brush hairs together to form a…larger mark-making entity within the bristle tip.…The Thickness slider enables you to mimic this behavior.…So if we take a look at Thickness, we will see if we start to turn this up,…we get very thick bristles.…You may not see it here, but if we decrease the number of bristles, it becomes…fairly obvious that we are now dealing with very fat individual brush hairs.…
So I typically play around with both Bristles and Thickness to come up with a…combination that I like.…To be honest, most of the time I keep Thickness down, because I do like to see a…lot of individual bristles within my brush strokes,…but there are times that the Thickness slider can be useful.…For example, if we turn Thickness up and Bristles down, well now I have a brush…that's almost like a piece of chalk, and I won't say this will act or look just…
- Understanding the axes of motion with a Wacom tablet
- Choosing a brush shape and Bristle Tip
- Adjusting brush angle
- Loading color and control the behavior of the Mixer Brush
- Modifying surface texture
- Simulating the texture of canvas
- Saving tool presets for brushes
- Creating a painting from a photograph
- Painting from scratch with the Mixer Brush
Skill Level Intermediate
Q: What factors affect how well the mixer brushes in Photoshop perform? Does document size (i.e. 72dpi vs. 240dpi) affect the performance of the brushes? How can I maximize brush performance?
A: The recordings for this tutorial were generally done at a standard screen resolution, but a real-world situation will often require higher resolutions. For example, offset printing generally dictates files at 300ppi (pixels per inch). Inkjet printing is often discussed in terms of 240ppi. For web-based viewing, imagery at 72ppi is considered acceptable. You can easily determine the pixel resolution of an image by multiplying the size in inches by the above ppi (pixels per inch) factors.
Let's use a typical real-world size as an example: 20" X 24". This is a common photographic print and frame size.
72ppi = 1440p X 1728p = 2,488,320 pixels
150ppi = 3000p X 3600p = 10,800,000 pixels
300ppi = 6000p X 7200p = 43,200,000 pixels
Note that each of these resolution factors quadruples the total pixel count.
It is the amount of pixels being manipulated that dictates both application and brush performance. With this in mind, we can state that performance decreases as image pixel size increases. There are three primary factors that affect an application's ability to handle large pixel-based manipulation.
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