https://bugs.winehq.org/show_bug.cgi?id=41422
--- Comment #8 from Tim Worthington eviltim@optusnet.com.au --- I found this bug affects two other pieces of CAD software: DesignSpark and PCB Elegance. I tracked to down to a problem with SetPixel(). It doesn't support the R2_XORPEN foreground mix mode as it should.