The new Magic Brush is introduced in Capture One 21 (14.3.0) to make brushing areas of similar color fast and simple. Simply draw a line or a doodle on the area you wish the mask to cover and Capture One will fill the area automatically.
By default, the Magic Brush tool can be found in the Layers tool or in the Cursor Tools Menu using the shortcut B, the same as the regular Draw Mask Brush. Like other cursor tools with identical shortcuts, you can switch between them by using Shift + B. If you prefer, you can set a custom shortcut for the Magic Brush in the Keyboard Shortcut Preferences.
1. Go to the Layers tool or Cursor Tools Menu.
2. Select the Magic Brush tool.
3. Right-click with the brush and you'll see the brush settings below.
Size - with this slider you can change the size of the brush.
Opacity - the slider shows the opacity of the mask the brush creates.
Tolerance - shows the range of colors the mask will cover. A low Tolerance will restrict the mask to similar colors, while a high Tolerance will pick up a wider range of colors when creating the mask.
Refine Edge - shows the refinement of the edge of the mask that will be created. A low Refine Edge value will result in a hard, defined edge, while a higher Refine Edge value will create a mask with a softer fall-off into the surroundings. The edge refinement happens per stroke on the mask area it creates. If you wish to refine the whole mask even further, you can do this by right-clicking the Layer and clicking Refine Mask.
Sample Entire Photo - determines if the mask will be restricted by edges. If enabled, the mask will cover all areas of the color that is being brushed on, regardless of whether the areas are connected (continuous) or not.
Resizing and changing parameters of the Magic Brush
Use similar shortcut actions as the regular Adjustment Brush:
Size: Ctrl + Opt + left-click and horizontal drag (right/left)
Tolerance: Ctrl + Opt + left-click and vertical drag (up/down)
Opacity: Shift + Ctrl + Opt + left-click and horizontal drag (right/left)
Refine Edge: Shift + Ctrl + Opt + left-click and vertical drag (up/down)
Size: Alt + right-click and horizontal drag (right/left)
Tolerance: Alt + right-click and vertical drag (up/down)
Opacity: Shift + right-click and horizontal drag (right/left)
Refine Edge: Shift + right-click and vertical drag (up/down)
Please note that any adjustments you make on Layers will only show if mask visibility is set to the option Only Display Mask When Drawing or Never Display Mask (or the shortcut M). If you have selected Always Display Mask, the Layer will show the mask overlay instead. The regular Eraser can be used to remove unwanted parts of the mask.
NOTE: Mask Visibility icon has been moved from the Layers tool to the Viewer Toolbar.
When applying brush strokes with the Magic Brush on an image, Capture One will automatically fill in the area of similar pixels to the ones covered by the stroke. This enables a fast way of masking areas and objects of similar colors (including gray scale).
The Magic Brush works additively, allowing you to continue making brush strokes on other areas of your image in order to get the mask you need.
IMPORTANT: The first stroke on an image with the Magic Brush will be a bit slower than the subsequent strokes, as Capture One will cache the RAW file to ensure a high-quality mask.