Join John Derry for an in-depth discussion in this video Using bristle tips, part of Photoshop CS5: Painting with the Mixer Brush.
The Bristle slider controls how populated your bristle tip is with individual brush hairs.…A sparse bundle of bristles will give you a brush that has a very sketchy quality.…Conversely, a thickly populated bristle tip will give you a full paint stroke.…Let's take a look at this adjustment.…So once again, here we are in the Brush panel, and if we go to our Bristle…Qualities, you'll see the top slider we have here is Bristles.…And a great thing that works in conjunction with all of these controls is the…Bristle Tip Preview down here, and you'll see, as I turned this down, we start to…see more and more individual hairs to where, if I take it all the way down, it's…likely just one broad hair in this particular brush, but this gives me a way to…really play with the character of these strokes.…
You can see now there is a much more visible shading within the stroke, that…indicates hairs within that.…Just by adjusting this, I can get a wide variety of looks based on what that setting is.…Now once you get up to one of the higher values, you are just going to have…
- 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.
For the full FAQ, please download the PDF file here.