<div dir="ltr">Hi Chris,<div>I work almost exclusively with nvidia hardware, but I remember having a similar problem, that turned out to be related to using triangle strips.</div><div>Maybe you can work around by pushing the geometry trough the optimizer to break triangle strips into triangles?</div><div>Laurens.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, May 20, 2019 at 11:18 PM Chris Djali <<a href="mailto:krizdjali@gmail.com">krizdjali@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
I've been playing around with this, and have an annoying issue. On my machine, which runs Windows and has a Radeon Vega 56, using three viewports with geometry shader instancing makes some triangles go missing in the second and third viewports. This happens in my own application and in a slightly modified version of the example. It works fine if I do everything in a single invocation, or run it on another machine, though, so I'm guessing it's a driver bug. I'd report it, but I've not found a place where AMD accepts issue reports in the form of a minimal executable reproducing the issue rather than a description of the bug and the name of the software it happens with. Does anyone have a link or contact at AMD so I can report this properly?<br>
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Cheers,<br>
Chris<br>
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