interiorImageSource

Indicates the image source applied to shape interiors. When null, shape interiors are displayed in the interior color. When non-null, image pixels appear in shape interiors, with each image pixel multiplied by the interior RGBA color. Use a white interior color to display unmodified image pixels.
By default, interior image sources are displayed as a repeating pattern across shape interiors. The pattern matches image pixels to screen pixels, such that the image appears to repeat in screen coordinates.