Strokes are rendered based on the brush attributes
            and the stencil. The stroke shape is formed by stamping the brush
            shape along the path created by the pen (or mouse) movement.
         
         The paint stroke controls
            have the following parameters:
         
         
            -  Operation  Paint
               materials define the material used to render the brush. Materials
               include: Paint (default, solid color), Reveal, Clone and Erase.
            
- Pressure  When
               drawing with a tablet, the pressure can be mapped to the size, opacity,
               or both (or can be set to Off) of the stamping pattern while drawing.
            
- Blend  The
               blending modes define how the stroke is blended with the current
               drawing—see 
                        Blend Modes.
            
- Matte Off & Invert  You
               can use stencils to apply paint strokes to an image—see 
                        Using Stencils.