CHAPTER 9 ADVANCED DRAWING 373 Figure 9-44. (Web hosting resellers)
CHAPTER 9 ADVANCED DRAWING 373 Figure 9-44. Options when saving an animated brush Spacing is the distance between consecutive brush marks, just as it was with simple brushes. It s specified as a percentage of the brush size. You ll have to experiment with this setting to find the right one for your brush. For grass, 8 or 10 works fairly well. Description is simply a text description you can give to your brush. Number of cells is the number of layers in your image. GIMP should initialize this for you. The rest of the options Cell size, Display as, Dimension, and Ranks control how the frames of the animated brush are chosen from the image, and in what order. For a simple animated brush like this, leave Dimension at 1 and set the first Ranks column to the number of cells (6, in this case). Note For more complicated brushes, you can choose to divide each layer into a grid, and then use each grid cell as a frame in the brush. Dimension and the other Ranks fields tell GIMP how the grid is set up and in what order to choose the frames. These make brush design more complicated; you re probably best off ignoring them until you get very comfortable with animated brush design. You can use them for effects like changing orientation according to the direction you re drawing. The menu next to the Ranks entry controls the order in which cells are chosen. Random picks a random layer each time; Incremental uses the layers in order; angular and velocity let you create more advanced effects, such as changing the brush image according to the direction or speed the mouse is moving. The other options, pressure, xtilt, and ytilt use those values from a drawing tablet if you have one. If you don t, you re better off sticking to Random or Incremental. Figure 9-45 shows the effect of drawing with the grass brush.
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