Krita/Manual/Brushes

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This manual is a rewrite of the 1.6 manual. It is not complete



Brushes

Brushes control what kind of effect is created when you paint with one of the paint tools. While the paint tools decide where you are painting, brushes control what is painted there. Brushes can include traditional natural media-like effects such as the hairy, spray and hatching brushes. Brushes can also manipulating existing pixels. Examples of those are the clone, filter and distort brushes.

Currently Krita has the following set of brushes:

  • pixel brush
  • chalk brush (might be subsumed into the soft brush)
  • curve brush
  • deform brush
  • duplicate
  • dyna brush
  • filter brush
  • grid brush
  • hairy brush
  • hatching brush
  • mixing brush (not yet finished)
  • mypaint brush (not yet finished)
  • particle brush
  • pixel pencil
  • sketch brush
  • smudge brush
  • soft brush
  • spray brush

The Pixel Brush

XXX: Image of the popup

Brushes are ordered alphabetically. The brush that is selected by default when you start with Krita is the Pixel Brush. The pixel brush is the traditional mainstay of digital art. This brush paints impressions of the brush tip along your stroke with a greater or smaller density.

Let's first review these mechanics:

1) select a brush tip. This can be a generated brush tip (round, square, star-shaped), a predefined bitmap brush tip, a custom brush tip or a text. 2) select the spacing: this determines how many impressions of the tip will be made along your stroke 3) select the effects: the pressure of your stylus, your speed of painting or other inputs can change the size, the color, the opacity or other aspects of the currently painted brush tip instance -- some applications call that a "dab". 4) depending on the brush mode, the previously painted brush tip instance is mixed with the current one, causing a darker, more painterly stroke, or the complete stroke is computed and put on your layer. You will see the stroke grow while painting in both cases, of course!

XXX: explanatory graphic

Brush Tips

Autobrush

Predefined Brushes

XXX: image

If you have used other applications like GIMP or PhotoShop, you will have used this kind of brush. Krita' is (mostly) compatible with the brush tip definitions files of these applications:

  • abr: GIMP autobrush tip definitions
  • gbr: GIMP single bitmap brush tip. Can be black and white or colored.
  • gih: GIMP Image Hose brush tip: contains a series of brush tips that are painted randomly or in order after each other. Can be black and white or colored. Krita does not yet support all the parameters yet.
  • abr: PhotoShop brush tip collections. We support many of the features of these brush files, though some advanced features are not supported yet.

The following table (XXX: copy from http://community.kde.org/Krita/ActionPlan2#Photoshop_brush_support_in_Krita) shows which parts of the ABR brush tip files are supported.

Note that the definition of ABR brushes has been reverse engineered since Adobe does not make the specification public. We strongly recommend every Krita user to share brush tips in GBR and GIH format and more complex brushes as Krita presets.

All predefined brush tips are shown in one selector. There are four more options that influence the initial bitmap brush tip you start painting with:

  • scale: scales the brush tip. 1.0 is the native size of the brush tip. This can be fairly large! When painting with variable size (for instance governed by pressure), this is the base for the calculations.
  • rotation: initial rotation of the brush tip.
  • spacing: distance between the brush tip impressions.
  • use color as mask: for colored brushes, don't paint the actual colors, but make a grayscale brush tip that will be colored by your selected foreground/background color.

This page was last modified on 29 July 2012, at 16:03. This page has been accessed 9,055 times. Content is available under Creative Commons License SA 3.0 and the GNU Free Documentation License 1.2.
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