Mari 4.6v4 docs:

Brush Properties

For each brush, Mari specifies several properties that you can view and change.

To view the properties of a brush, select a painting tool such as Paint, Blur, Vector Paint, Paint Through, Gradient, and Clone Stamp, then select a brush in the Shelf palette, and open the Tool Properties palette. The following properties display.

Property	Explanation	Example
Brush Settings
Noise	How much noise to add to each splat, to soften the appearance and reduce banding. Lower values give a harder brush, higher values a softer brush. (You can also add noise to the brush tip itself - under the Noise section below.) Range: 0.00 to 100.00, Reset: 0
Spacing	The space between splats, as a proportion of the width of a splat. 1.00 = side-by-side (so if the tip is a circle, it would look like a string of beads.) .02 = .02 x the width of a splat. Range: 0.02 to 5.00, Reset: 0.02	A stroke from the same brush with spacing set to .02, .25, .50, and 1.0:
Paint
Opacity	How dark a stroke can be (maximum alpha). Range: 0.01 to 1.00, Reset: 1.00	A stroke from the same brush with opacity set to 1.00 and 0.50 with no jitter, and 1.00 with maximum jitter:
Flow	Mimics how quickly paint is applied, by setting the maximum opacity in a splat. Range: 0.01 to 1.00, Reset: 1.00	A completely hard brush tip, full opacity, with spacing of 0.15 and flow at 1.00 and 0.30:
Jitter Opacity	Whether to randomly vary the opacity (to the degree specified in Jitter Opacity Max).
Jitter Opacity Max	How much to randomly vary the opacity (if JitterOpacity is enabled). Range: 0.00 to 1.00, Reset: 0.00
Position
Jitter Position	Whether to randomly vary displacement from the line of the brush stroke (to the degree specified in Jitter Position Max).
Jitter Position Max	How many pixels at most to randomly vary displacement from the line of the brush stroke (if JitterPosition is enabled). Range: 0 to 1000, Reset: 20
Pressure Whether pressure on the graphics tablet affects properties of a splat (as calibrated for your tablet)
Colors	Whether more pressure increases the color strength.
Radius	Whether more pressure increases the radius.
Flow	Whether more pressure increases the flow.
Opacity	Whether more pressure increases the opacity.
Radius
Radius	How many pixels at most the radius of splat can be (if JitterRadius and/or RadiusPressure are enabled). Range: 1 to 1200, Reset: 100	A stroke with and without radius jitter, where the jitter is equal to the whole radius of the brush:
Squish	How much to flatten the radius. If the brush tip is a circle, 1.0 is a circle, .5 is an oval half as tall as it is wide. Range: 0.05 to 1.00, Reset: 1.00
Jitter Radius	Whether to randomly vary the radius (to the degree specified for the Radius and InnerRadius).
Inner Radius	How few pixels the radius of a splat can be (if JitterRadius and/or Radius Pressure are enabled). Range: 1 to 1200, Reset: 1
Rotation
Rotation	The degree to which the brush rotates to match the direction you're painting (if Align to Stroke is enabled). Range: 0.00 to 360.00, Reset: 0.00
Align to Stroke	Whether the brush tip rotates along with the direction you're painting. (With calligraphy, for example, the tip does not align.)
Jitter Rotation	Whether to randomly vary the rotation.
Jitter Rotation Max	How many degrees at most to randomly vary the rotation (if Jitter Rotation is enabled). Range: 1 to 360, Reset: 360
Steady Stroke
Mode	Whether to use the Off, Distance, or Smoothing mode. Reset: Distance
Delay	Defines how much delay is used for the brush stroke. In Distance mode, the Delay uses the specified amount of screen pixels, keeping a fixed distance, to define the brush stroke. In Smoothing mode, the Delay uses the moving average of the cursor movement to define the brush stroke. Note: When you move the mouse very fast, Mari gets fewer samples, so the delay looks longer. Range: 0 to 200. Reset: 0.00
Tail	Whether to use the No Tail or Meet options for the finishing strokes. • Meet - The brush stroke catches up to the cursor's position when releasing the mouse or pen. • No Tail - The brush stroke stops as soon as the mouse or pen is released, with no catch-up. Reset: No Tail
Tilt
Y Stretch	Stretches the brush splat vertically (Y direction) based on tablet pen tilt.
X Stretch	Stretches the brush splat horizontally (X direction) based on tablet pen tilt.
Brush Tip
Bitmap
Use Painting	Click to use the painting in the paint buffer as a brush tip. Mari prompts you to save it either as an .exr or a .tif file (which file format is used depends on the support in your graphics card). Note: EXR files are 16-bit - most other bitmaps are 8-bit.
Path	Type the path or click the button to select an existing bitmap to use as the brush tip.
Type	To use an image as the brush tip, you need to set Type to Bitmap.
Geometry
Vertical Shear	How much to distort the brush tip diagonally, top to bottom (as if pulling opposite corners up and down). Range: -1.00 to 1.00, Reset: 0.00
Horizontal Shear	How much to distort the brush tip diagonally, right to left (as if pulling opposite corners right and left). Range: -1.00 to 1.00, Reset: 0.00
Vertical Scale	How much to distort the brush tip vertically. Range: 0.00 to 2.00, Reset: to .50
Horizontal Scale	How much to distort the brush tip horizontally. Range: 0.00 to 2.00, Reset: to .50
Noise
Octaves	Number of applications of noise. Range: 1 to 8, Reset: 4	The same brush with the default and maximum noise:
Frequency	How many spikes per octave. Range: 0.00 to 100.00, reset to 1.00
Scale	How big the spikes are, as a proportion of the radius (1.00 = twice as big as the radius). Range: 0.00 to 1.00, Reset: 0.00
Segments	Lines making up the brush outline, to which noise is applied (4=square, 360=circle). Range: 4 to 360, Reset: 360
Profile
Profile	For rendered brushes (see Brush Properties above), alpha profile of the brush tip from center to edge - determines how “hard” or “soft” it is. In the Curve Editor, to move values along a curve, you can drag any of the points on the curve in any direction, and see the effects in the preview bar below the curve. Click to add a new point, and right-click to invert, select presets, and export and import settings. To remove a point, click on it while holding Ctrl/Cmd.	Hard and soft brush tip profiles:
Bit Depth	Byte (8-bit), Half (16-bit), or Float (32-bit) It is generally a good idea to use a brush with the same bit depth as the texture you're painting, to avoid stepping. Note that if you use an 8-bit bitmap, it still paints in 8-bit even if you set the bit depth to Half.
Resolution
Height Pixels	Set the height resolution of the brush tip.
Width Pixels	Set the width resolution of the brush tip.
Scratch pad - shows a squiggle painted with the selected brush. You can also paint directly in the scratch pad (the default squiggle disappears while you enter a stroke).

Note: The texture properties vary from one painting tool to the other and some tools do not have texture properties. Only the tools containing texture properties are listed below.

Property	Explanation	Example
Texture
Blur Tool
Blur	Specifies the blur value.
Paint Through Tool
Description	Displays the tool function.
Name	Displays the tool name.
Image
Filename	Sets the filepath of the image file to project as a texture.
Info
Description	Displays the colorspace information of the image used to project as a texture.
Height	Displays the image height.
Width	Displays the image width.
Preview
Preview Alpha	Specifies the transparency of the image previewed over the canvas.	Range: 0.10 to 1.00
Image	Displays a preview of the image.
Transform
Image Scale	Sets the scale of the image on the x and y axes. This scales the image relative to the image's size. The button locks the current Image Scale values so that any changes to scale are applied proportionately to both axes.
Pan Lock	Locks the image position relative to the model. If you pan the model, the image that you're painting through pans too.
Scale Lock	Locks the image size relative to the model. If you zoom the model in or out, the image that you're painting through zooms in or out too.
Reset Size	Resets to: • ToOriginalSize • RelativeToPaintBuffer
Auto Reset	Sets the Auto Reset option to: • Reset • DoNotReset
Reset	Resets any transformations applied to the image using the Image Scale, Rotation, Scale or Translation options. This Reset option is dependent on what you set in the Reset Size and Auto Reset options.
Rotation	Sets the rotation of the image used by the Paint Through tool.
Scale	Sets the scale of the image on the x and y axes. This scales the image relative to the canvas size.
Translation	Sets the translated xy position of the image used by the Paint Through tool.
Gradient Tool
Type	Selects between Linear or Radial gradient.
Out Point	Specifies how far through the gradient the final color reaches.	0.00 to 1.00, higher values imply the end color is reached later.
In Point	Specifies how far through the gradient the start color lasts for (before it starts graduating into the end color).	0.00 to 1.00, higher values imply the start color finishes later.
End	Sets the final color for the gradient (color that the gradient ends up as).
Start	Sets the first color for the gradient (color the gradient starts out as).
Preview
Preview Alpha	Selects the alpha value displayed by the preview of the gradient floating over the main canvas.	Range: 0.10 to 1.00
Image	Displays a preview version of the gradient.
Transform
Pan Lock	Locks the image position relative to the model. If you pan the model, the gradient that you're painting pans too.
Scale Lock	Locks the image size relative to the model. If you zoom the model in or out, the gradient that you're painting zooms in or out too.
Reset Size	Resets to: • ToOriginalSize • RelativeToPaintBuffer
Auto Reset	Sets the Auto Reset option to: • Reset • DoNotReset
Reset	Resets any transformations applied to the image using the Image Scale, Rotation, Scale or Translation options. This Reset option is dependent on what you set in the Reset Size and Auto Reset options.
Rotation	Sets the rotation of the image used by the Gradient tool's preview.
Scale	Sets the scale of the image used by the Gradient tool's preview.
Translation	Sets the translated xy position of the image used by the Gradient tool's preview.
Clone Stamp
Description	Displays the tool function.
Name	Displays the tool name.
Image
Relative	When enabled, clones from an offset point relative to the source point. When disabled, clones from the source point position.
Clone From	Sets values (0 to 1) to clone from the image on the x and y axes. The button locks the current Clone From values so that any changes to Clone From are applied proportionately to both axes.
Filename	Sets the filepath of the image file used for clone stamping.
Info
Description	Displays the bit depth and the image channels of the image used for clone stamping.
Height	Displays the image height.
Width	Displays the image width.
Preview
Onscreen Preview	When enabled, displays the image on the canvas.
Preview Alpha	Specifies the level of transparency of the image preview displayed over the canvas.	Range: 0.100 to 1.000
Image	Displays a preview of the image used for clone stamping.
Transform
Image Scale	Sets the scale of the image on the x and y axes. This scales the image relative to the image's size. The button locks the current Image Scale values so that any changes to scale are applied proportionately to both axes.
Pan Lock	Locks the image position relative to the model. If you pan the model, the image that you're painting pans too.
Scale Lock	Locks the image size relative to the model. If you zoom the model in or out, the image that you're painting zooms in or out too.
Reset Size	Resets to: • ToOriginalSize • RelativeToPaintBuffer
Auto Reset	Sets the Auto Reset option to: • Reset • DoNotReset
Reset	Resets any transformations applied to the image using the Image Scale, Rotation, Scale or Translation options. This Reset option is dependent on what you set in the Reset Size and Auto Reset options.
Rotation	Sets the rotation of the image used by the Clone Stamp tool's preview.
Scale	Sets the scale of the image on the x and y axes. This scales the image relative to the canvas size.
Translation	Sets the translated xy position of the image used by the Clone Stamp tool's preview.
Scratch pad - shows a squiggle painted with the selected brush. You can also paint directly in the scratch pad (the default squiggle disappears while you enter a stroke).