The operation used by Apply To All.

How the color is to be applied to the surface.

See about accumulate to stencil . By default, the operation is applied and the stencil cleared after every brush stroke. When this option is on, Houdini does not apply the stencil until you click Apply and Clear Stencil.

Applies the operation and clears the stencil. This is equivalent to right-clicking in the viewport.

Colors to apply unless bitmap stamping is enabled. If Accumulate To Stencil is on, the left mouse does foreground and the middle mouse erases.

If set, the color channels of the bitmap are used directly rather than the brush color.

Paints all of the selected geometry.

Operation to use for Apply to All.

You can not use this parameter to switch the Paint SOP into other operations. You can only use the in the viewport to set these operations.

For example, if you set this parameter to Erase Changes, but the menu is set to Paint, this parameter will switch to Paint as soon as you click in the viewport.

Restores geometry to initial state.

Adds the Cd and Alpha point attributes if not present and not overridden and required.

When set gives a paint-on-glass effect. The painting on the surface will increase the alpha, so painted areas become visible. Note this has no effect on areas with alpha of one.

Alpha values are accumulated, so you probably want to reset the Alpha attribute to 0 using a Point node before the Paint node.

If enabled, lets you paint values of the specified attribute instead of the default Cd (diffuse color).

Only Cd and Alpha affect the display of surfaces in the viewport (and Transparency on the Misc tab of the display options must be on to see Alpha). The Override color and Override Alpha options let you paint alternate attributes, but they won’t automatically show up as color and transparency in the viewport like Cd and Alpha do. (You can use Visualize attribute to show a non-color attribute as false colors.)

If Accumulate alpha is on, this node will use the Alpha attribute to accumulate alpha data (based on the opacity of the brush). If enabled, this parameter stores the stroke opacity data in the specified attribute instead of the default Alpha, similarly to Override color.

You could instead use Override color set to Alpha to paint directly into the Alpha channel. In that case, the value of the color would be set as the alpha value, instead of the opacity of the brush being accumulated.

Whether to do a false color visualization of the overridden attribute and what range to map to. See also visualizing attributes.

How to map the attribute value to a color.

The basic shape of the brush: circle, square, or bitmap.

What bitmap to use. The alpha channel becomes the brush.

The radius of the brush when painting in the 3d viewport.

The radius of the brush when painting in the 2d viewport.

This controls how much effect the pressure of a stylus will have on the radius. A value of 1 means the radius will go from 0 to the amount in Radius. A value of 0 will mean the radius will always be constant, regardless of pressure. A value of 0.5 will mean the radius will be scaled between one half of Radius and Radius.

If set, this limits how far the brush will paint along its axis. This can be used if connectivity is disabled to limit the effect of the brush. The first parameter is how deep below the surface the brush should penetrate. The second is how high above the surface it should stop. These values can be negative.

How far to rotate the brush.

Amount to squash the brush in the y direction before rotation.

The amount to affect the stencil mask.

This controls the how much effect the pressure of a stylus will have on the opacity. It obeys the same scaling as the Radius Pressure.

A random noise in the brush’s opacity based upon the position on the brush.

A random noise on the object’s stencil mask based on the object position.

Percentage of the brush to be rolled off.

Which metaball kernel to use for the roll off.

How the brush should be oriented on the surface:

The fixed up vector to orient brush to.

If set, the brush will perform reflective symmetry. Any strokes will be mirrored along the plane of symmetry.

If set, the brush will perform rotational symmetry. Any strokes will be rotated around the axis of symmetry.

This defines the normal of the plane of symmetry for reflection and the axis of symmetry for rotation.

This defines the origin of the plane of symmetry for reflection and the origin of the axis of symmetry for rotation.

This defines the degree of rotational symmetry. A degree of 3 means the stroke will be applied 3 times at 120 degree separation. A value of 5 will perform the stroke 5 times with 72 degrees of separation.

This is the distance of the plane of symmetry from the origin of symmetry.

If set, the brush will reflect when brushing is done in the UV viewport.

The origin of the line of reflection in the UV viewport.

The angle of the line of reflection in the UV viewport. 0 will mirror about the U axis, 90 will mirror about the V axis.

Switches between the brush being perpendicular to the surface or always oriented along the view direction. If you are having trouble with a shaky brush, try turning this off. Turn this off in order to brush on disconnected points, (point clouds).

If set, the tool will only affect points connected to the closest point to the intersection. This is usually a good thing, as it avoids accidentally painting through the geometry (but see the depth parameter), but can prevent smoothly painting across seams. This should usually be turned off in order to brush on disconnected points, (point clouds), since they are not connected to each other.

If set, the tool will only affect points facing in the same direction as the closet point to the intersection. This is usually good to avoid accidentally painting the backfacing parts of geometry, but if you want a pure depth brush can be turned off.

Set this to paint geometry as it’s deforming.

The current direction of the brush. If orient to surface is on, this is the normal direction of the surface hit by the brush. Otherwise, it is the direction from the eye to the surface.

The current location of the brush. This tracks the surface as the brush moves along it.

The primitive number of the primitive the current brush is centered at.

The location the current brush is on the current primitive. Note this is a parametric UV location, not the texture UV location.

The amount of force the brush is currently applying. This is only meaningful when a tablet interface that supports pressure is used.

The point closest to the current brush’s center.

Controls the current state of the brush. When it is on No-op, the values of the stroke tab are ignored and no updating of the geometry is done. Other values are set automatically as you brush the surface, allowing the SOP to update in response to your actions.