Stops in order, spread evenly from the first to the last.
Which way the run goes — a named edge-to-edge direction, or explicit endpoints.
A straight run between two points.
Stops in order, from the centre outwards.
Optionaldirection?: GradientDirectionUnused for a radial gradient, which always runs centre to corner.
A run outward from the node's centre, reaching the corners.
A gradient, as a background fill or as the alpha of a Mask.
Colours are spread evenly from the first to the last; a single colour sits at the midpoint. A radial gradient runs from the node's centre to the corner, so it covers the whole box.