How to Change Brush Size in Blender Sculpt Mode

Adjusting brush size in Blender’s Sculpt Mode is a fundamental skill that allows 3D artists to seamlessly switch between broad mesh shaping and intricate detail work. This guide provides a quick overview of the most efficient ways to change brush size in Blender, including primary keyboard shortcuts, top bar settings, and dynamic mouse controls to streamline your digital sculpting workflow.

Method 1: The Fast Keyboard Shortcut (F Key)

The quickest and most common method to adjust brush size while sculpting is using the dedicated shortcut key:

  1. Hover your cursor over the 3D Viewport in Sculpt Mode.
  2. Press the F key on your keyboard.
  3. Move your mouse away from or toward the center to increase or decrease the brush radius.
  4. Left-click or press Enter to set the new size.

Note: You can press Esc or Right-click to cancel the adjustment and revert to the previous brush size.

Method 2: Bracket Keys

If you prefer step-by-step incremental changes similar to software like Adobe Photoshop:

  • Press [ (Left Bracket) to decrease the brush size.
  • Press ] (Right Bracket) to increase the brush size.

Method 3: Top Header Bar Settings

For precise numerical input:

  1. Look at the top bar above the main 3D Viewport.
  2. Locate the Radius setting.
  3. Click and drag the slider to adjust the size, or click on the field to type an exact pixel value.

Method 4: Right-Click Context Menu or Sidebar

You can also adjust brush parameters directly within pop-up menus:

  • Right-click Menu: Right-click anywhere in the 3D Viewport to bring up the context menu, then drag the Radius slider.
  • Sidebar (N-Panel): Press N to open the sidebar, navigate to the Tool tab, and adjust the Radius slider under the Brush Settings section.

Enabling Pen Pressure for Brush Radius

If you are using a drawing tablet, you can set the brush size to respond dynamically to pen pressure:

  1. Locate the Radius setting in the top bar.
  2. Click the tablet icon next to the Radius slider to toggle pressure sensitivity for the brush size.