Join John Derry for an in-depth discussion in this video Assigning TouchRing functions, part of Photoshop CS5: Painting with the Mixer Brush.
One of the nice things about the Wacom Intuos4 is an item on the Control…surface called the Touch Ring, and the Touch Ring is just a circular area with…a depression in it that makes it very easy, like a slight groove, to run your fingers through.…In the center, is a button that you can assign four different functions to, to…use this Touch Ring to, say, rotate your canvas.…I am going to show you now how you can assign those elements to the Touch Ring…to take advantage of it within Photoshop CS5.…
I will show you right now.…I am going to click through this so you can see that each time I click, I can…get to one of four functions I have assigned to my Touch Ring.…This is really nice. In the initial iteration of the Intuos4,…they didn't show this on the screen so you were left to have to remember the…order of things you put in here.…It's really nice that this now shows up.…So let's go through, and I will show you each one of these.…The Auto Zoom and Scroll lets me do just that.…
I'm using my finger on the Touch Ring, so without having to take my hand away…
- 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.