Join John Derry for an in-depth discussion in this video Restoring detail, part of Photoshop CS5: Painting with the Mixer Brush.
When an artist paints, traditionally, he has to start from nothing and build it…up until he has completed with the final details.…We have the benefit here of starting with a perfectly refined, finished image…and we go back, and we first destroy all that detail.…That's what we did previously.…Now, we're going to go in, and we're going to start to bring detail back, and…one thing I can tell you about the way this works is your brush is like a…aperture on a camera.…Just like the aperture on a camera, as it gets smaller, it records finer and finer…detail. As you adjust the size of your brush, smaller brush size is going to…start to reveal greater detail.…
And we're going to take advantage of that fact, and I'm going to create another layer.…And to do this, we need to shut this layer off temporarily.…So there is a little bit of a shell game going on here.…You're not going to see this in concert with this layer at the same time,…although we will turn it on and off to check our progress.…But you do need to shut this back off because, once again, we are going to sample…
- 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.