Join John Derry for an in-depth discussion in this video Creating an underpaint layer to remove photographic detail, part of Photoshop CS5: Painting with the Mixer Brush.
With Photoshop's new Mixer brush and Bristle Tips, you really have two primary…directions that you can take these tools.…One is to paint from scratch with a blank canvas as your starting point, or…you can start with a photograph and use these tools to interact with the…photograph that you're dealing with. And in this exercise, we're going to go…through, and I'm going to show you how you can deal with a photograph but deal…with it in a nondestructive way, so that you've always got the original…information available.…
So, to start, I'm going to go to my exercise file here, and we'll go to Open and…here on the desktop, we have a file, door.…So, we'll open this up, and what you could do is just paint on this as it is.…For example, I'm going to take my Blender brush here, and let's just kind of play around.…You can see very nicely here that I'm able to interact with this image.…
Think of the image as if it were wet oil paint, and your brush doesn't have any color on it;…it' just the dry brush. And because the oil paint is wet, when you dip that…
- 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.