Join John Derry for an in-depth discussion in this video Color wells: Reservoir and pickup , part of Photoshop CS5: Painting with the Mixer Brush.
Color wells represent the source of colors that makes the mark.…The Color Reservoir supplies the color that flows from the brush.…The Pickup Reservoir represents the color that is picked up from the canvas and…mixed with the reservoir color. Let's take a look.…The key to the Mixer brush behavior is its multiple color reservoirs, or wells.…These wells represent sources of color used by the Mixer brush.…The color well is the color that flows from the brush.…
You're already familiar with a color well from previous models of brushes in Photoshop.…In the previous iterations of Photoshop, the color typically comes from the…current color square, and that constitutes the color well that makes up those brushes.…The color well, in relation to the Mixer brush, is controlled by the Load…adjustment on the Mixer brush option bar.…Higher values represent greater well capacity,…for example, a brush that will have a longer stroke life.…
The pickup well is the underlying color that is picked up by the brush.…
- 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.