Written by Ryan Allan
Updated over a week ago

The brush is one of your primary painting tools. The default keyboard shortcut for this tool is B. View the video below for more about the tool or scroll on for the written guide:

There is a range of different characteristics for your brushes which can be adjusted in the settings panel under your color wheel. To see the full range of settings, click the gear icon and set the mode to Full.

Brush settings

The different settings and characteristics include:

  • Size

  • Density

  • Opacity

  • Stabilizer

  • Shape

  • Hardness

  • Spread

  • Spacing

  • Color

  • And color jitter.


This sliding scale determines the size of your brush.

There are two checkboxes for size settings. The first one activates the pressure sensitivity for your brush. The second box changes the size ratio where the maximum size for the bar is either 10px, 100px, or 500px.

Below the size bar are two smaller bars. On the left is the minimum size percentage for your brush. At 0%, the minimum brush size will be 1px.

The bar on the right is for size jitter. Increasing the percentage will cause each stamp of the brush to vary in size.

The default shortcut keys for decreasing and increasing your brush size are [ and ] respectively.


Lowering the opacity of your brush will make your strokes of paint more transparent. The paint will not accumulate until you lift your pen and then make another stroke.


Density determines how much paint your brush is loaded with. A lower percentage in the density bar will mean that a lighter amount of paint is applied. Paint will also accumulate as you move over areas that you’ve already painted on without needing to lift your pen. This is different to opacity where the color will not accumulate until you lift your pen and add another stroke.

The density setting can also be set to increase with pressure.


The stabilizer will help you get smoother and neater lines.

Increasing the percentage can impact Magma’s performance on your device.


Magma currently has 8 default brush shapes available, each giving a different feel and texture to your brush.

Angle and angle Jitter

Adjusting the angle slider will rotate the shape of your brush.

Increasing the slider of the Angle jitter bar will cause each stamp of your brush


The spread setting causes your brush to randomly stamp around the point of your pen cursor.

Increasing the bar will increase the distance distance of that spread.

Unlocking or unchecking the box for this setting will split your bar into two parts: a normal spread percentage and a tangent percentage.

Increasing the tangent percentage will increase the stamping distance along the direction of your brush stroke.

Increasing the normal spread percentage will increase the stamping distance perpendicular to the direction of your brush stroke.


Increasing the spacing percentage will increase the distance between each stamp of your brush shape


Adjusting these color dynamics settings are a great way to add variety to your brush strokes.

The first bar determines jitter between your selected foreground and background colors. Increasing the percentage will increase how much of the background color is added.

Each stamp of the brush shape will have a randomized degree of variation within the percentage you’ve specified.

Checking the box next to this will activate this setting based on pressure sensitivity.

Color Jitter

Color jitter includes sliders for the three color characteristics: hue, saturation, and brightness.

Adjusting these sliders will cause each stamp of your brush shape to vary in color according to the percentage of each slider.

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