Join John Derry for an in-depth discussion in this video Understanding the axes of motion, part of Photoshop CS5: Painting with the Mixer Brush.
Throughout this title, I am going to be taking advantage of the Wacom tablet and…stylus, and I'm working with the Wacom Intuos4.…One of the benefits of this tablet is that it has a control surface on it with…some programmable buttons, and I am going to be going through how to take…advantage of these programmable buttons, so that you can enhance your workflow.…The other thing I'm working with is the Wacom Art Pen.…The Art Pen senses all six degrees of motion, and we'll talk about that in a moment.…
But the other thing that you want to notice is there is a pair of buttons on…the barrel of this pen, and just like the control surface, we can program these…for specific functions.…I will be showing you how to do that, as well.…All of an artist's gestural expressiveness is communicated by six axes of…motion. Combined with an advanced input device like a Wacom tablet,…Photoshop's Mixer brush and Bristle Tips take advantage of this information to…faithfully simulate traditional mark-making media.…
Let's take a look at these axes.…
- 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.