[OpenMap Users] OMPoly - fill with translucent fillPattern ?

Hello,
        I'd very much like to fill an OMPoly in a Layer with a translucent
crosshatch pattern (an opaque set of lines with transparent areas
revealing other layers). Using a DrawingAttribute, I've loaded a
fillPattern of a (mostly transparent) GIF and used this to fill the poly
(omPoly.setFillPaint(drawingAttributes.getFillPattern())).

However, when rendered, the GIF in the OMPoly appears completely opaque
onscreen and indeed:

  ((Transparency) obj).getTransparency() == Transparency.OPAQUE

The 'background' Color 'behind' the GIF is white (which is a little
interesting... why is this the default color and could I change the Alpha?).

My question is, short of manually rendering a crosshatch pattern, have
you any suggestions for creating a translucent textured fill for an OMPoly?

Sorry if this question veers beyond OpenMap into 2DGraphics territory...

The GIF file is here for reference;

   http://www.classforge.com/openmap/red_hatch_32x32.gif

Thanks in anticipation,

    matt :-)

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