Minimum requirement: Qubicle Basic Edition
The Area Tools affect an area of voxels and contain two additional options at the bottom of the toolbar. Contiguous affects only connected areas of color instead of all voxels of the same color. Tolerance sets the variance in color of the affected area.
Paint Bucket (G) recolors voxels of the same or similar color. The Paint Bucket can also color all voxels in a rectangular area by dragging a selection and releasing.
Magic Wand (W) selects an area of the same or similar color.