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Multi coloured blotches

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I''ve done a simple create for a d3d full screen window, with a black background (nothing else), one strange thing though there seems to be a radom pattern of multi coloured flickering blotches, what could be the symptom of this?? I tried taking a screenshot but the screenshot seems to only capture the black background.

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It could just be garbage in video memory which isn''t cleared out because you haven''t written any polygons to the screen yet. Does it go away when you add a BeginScene/EndScene and importantly a Clear() ?



--
Simon O''Connor
Creative Asylum Ltd
www.creative-asylum.com

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Ah ha, I figured it out, when I was clearing the back buffer I was also clearing the Z buffer, except I neither have the Z buffer enabled nor do I need it either (2d game).

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