The Shape on the left has the appearance Material2D filled set to true, so the image is seen instead of what would otherwise be a single colored filled rectangle.
The Shape on the right has the appearance Material2D filled set to false. The appearance of the Rectangle geometry in this case with the texture present is that the surface of geometry is textured, and then the outline is drawn around the periphery of the rectangle. The material emissiveColor has been set to 0.0 0.0 1.0, ie blue, to make the outline more visible than the Material2Ds default light gray color. Note: the filled=false does not change the geometry itself, which is always a 320x240 rectangle, since those fields belong to the appearance of the same so it does change the final look of the basic geometry.
Snapshot taken of rendered output.
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