u can edit Page.RenderPrepare() like this:
final public void RenderPrePare( DIB dib )
{
if(dib == null)
renderPrepare( hand, 0 );
else
renderPrepare( hand, dib.hand );
}
and using Page.RenderPrepare(null); to reset rendering status, before Page.RenderToBmp() invoked.
or just using codes:
DIB empty_dib = new DIB();
page.RenderPrepare(empty_dib);
before Page.RenderToBmp() invoked.