Vector Visuals

When adding a VisualImageObject to another VisualObject that has a
Composite set in its Brush for transparency, the VisualImageObject is
rendered with the same Composite, even if this is not desired. Calling
setFillBrush on the VisualImageObject does not change this, since
VisualImageObject does not apply Brushes in its renderObject()
implementation.

A quick and dirty fix to make all Images opaque is to add the line

new Brush(null, null, null).useOn(g);

in VisualImageObject's renderObject() implementation.