How do I fill in rectangles and ellipses?

[tslewis123]

When I use image paint with the paint tool and paint a rectangle or ellipse, it only paints the outer perimeter and leaves the ground visible in the center. Is there a way to fill in the center of rectangles and ellipses? I want to be able to easily paint things like the floor of a building or a small body of water.

[LordEntrails]

Select the alternate/circular icon on the bottom right of the stamp/brush window (see image) and note that the title switches from Stroke to Fill. Drag a fill texture (from assets) into the window or select a solid fill color.
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