Size sets the radius of the brush. Size is measured in world space units (for example, by default a Size of 100 = a radius of 100 centimeters). Hotkeys: hold B+LMB and drag the cursor, or use "[" (to reduce size) "]" (to increase size).
Strength determines how much the brush affects the surface. Depending on the brush, this property is represented either as a percentage of the maximum power available or as a height expressed in world space units. Hotkeys: hold M+LMB and drag the cursor, or use ";" (to reduce strength) "'" (to increase strength).
Invert Function inverts the function of the brush. For example, the primary function of the Soft brush is to pull vertices up, and its inverse is to push vertices down. Not all brushes have an inverse function. Default hotkey: hold Ctrl to invert function while brushing.
Mirror reflects a stroke from one side of a mesh to the other, along the specified axis.
Flood applies the brush's function uniformly across the entire surface. Flood does not apply the function to areas of the surface that are hidden, frozen or concealed by a stencil.
Direction specifies the direction vertices are moved when affected by a brush.
Falloff defines how the influence of the brush falls off from the center point of the brush tip.
Snap constrains points to the grid.
Store captures the current Falloff curve and stores it on the tray.
Stamp modifies the strength of the brush according to the grayscale values of an image. The darker the values the lesser the strength. Not all brushes work with Stamps.
Off turns off the Stamp.
Import launches a file browser for loading images. Mudbox currently supports the following image file formats: bmp, jpeg, png. The stamp image can also be set using the Image browser. Just select a thumbnail in the browser and press the Set Stamp icon on the Image Browser bar.
Store captures the current Stamp image and stores it on the specified tray. Tip: Storing multiple images can be done by moving/copying images to the "stamps" directory before starting Mudbox. The "stamps" directory can be found in the installed Mudbox folder (by default: C:\ProgramFiles\Mudbox\Mudbox<VersionNumber>)
Rotate rotates the Stamp image clockwise.
Visibility determines the Stamp's visibility for the Stamp Tool.
Orient To Stroke orients the stamp such that its top points along the direction of the stroke.
Position Jitter randomizes the position of the brush tip dynamically through the stroke.
Rotate Jitter randomizes the orientation of the brush tip dynamically through the stroke.
Scale Jitter randomizes the size of the brush tip dynamically through the stroke.
Opacity Jitter randomizes the strength of the brush tip dynamically through the stroke.
Flip Randomize X randomly flips the position of the brush tip along its X axis dynamically through the stroke.
Flip Randomize Y randomly flips the position of the brush tip along its Y axis dynamically through the stroke.
Stamp Drag modifies the strength of the brush according to the grayscale values of an image. The darker the values the lesser the strength. Not all brushes work with Stamps.
Stretch Stamp scales the stamp along the stroke non-proportionally stretching it along the stroke. Works in conjunction with Stamp Drag.
Min Size specifies how small the brush size is when the lightest pressure is applied to the pen. Min Size is expressed as a percentage of the primary brush Size. For example, a Min Size of 100 indicates there is no size variance, regardless of the pressure applied.
Min Strength specifies how weak the brush strength is when the lightest pressure is applied to the pen. Min Strength is expressed as a percentage of the primary brush Strength. For example, a Min Strength of 100 indicates there is no strength variance, regardless of the pressure applied.
Remember Size preserves the size of the brush between usage. With Remember Size off, the brush will inherit the size of the brush used before it.
Orient To Surface orients the brush ring display (in the 3d view) along the normal of the face under the center of the ring. Orient To Surface does not influence the effect of the brush on the surface -- only the display of the cursor.
Project Through uses the camera to project the brush through the active mesh such that the brush affects any points of that mesh which sit on the vector defined by the camera and the brush.
Affect All Layers permits the smooth brush to smooth information stored on all layers. If Affect All Layers is OFF, the smooth brush only smooths the information stored on the active layer. In this case, if the active layer contains no information, the smooth brush has nothing to average and therefore does not modify the surface.
Continuous Stroke connects individual stamps along a stroke to create a more solid stroke.
Prevent Overlap removes overlap between segments of a stroke that are less than the size determined by the Radius property. The Soft B brush uses Prevent Overlap and is good for fast sculpting on dense meshes.
Radius specifies the minimum distance between stamps before overlapping is removed. Radius is set as a percentage of the brush size.
Curved Stroke rounds out a curvy stroke by interpolating a smooth curve through the pick points of a stroke. Stamping of the brush follows the interpolated curve.
Stroke Quality sets the quality of the Curved Stroke. A higher value increases the number of stamp points inserted along the interpolated curve, which improves accuracy while slowing performance.
Update Plane is a Flatten brush property, which causes the plane that vertices move toward to be recalculated after each stamp in a stroke. If unchecked, the flatten brush will use the plane defined by the initial stamp for the entire stroke.
Whole Stroke is a Flatten brush property, which specifies that the plane that vertices move toward will be calculated from all the vertices affected by the stroke so far. If unchecked, only the vertices affected by the latest stamp are used to calculate the plane. The Update Plane property must be ON for Whole Stroke to have an effect.
Buildup Rate specifies the rate at which the brush deformation grows to reach the Strength value (assuming a constant pen pressure).
Selection Mode is a Selection brush property, which determines how the brush operates in the scene.