<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Graphical glitches in Unreal Engine 4"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83510#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Graphical glitches in Unreal Engine 4"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83510">bug 83510</a>
from <span class="vcard"><a class="email" href="mailto:hverbeet@gmail.com" title="Henri Verbeet <hverbeet@gmail.com>"> <span class="fn">Henri Verbeet</span></a>
</span></b>
<pre>(In reply to Marek Olšák from <a href="show_bug.cgi?id=83510#c8">comment #8</a>)
<span class="quote">> (In reply to Christoph Haag from <a href="show_bug.cgi?id=83510#c7">comment #7</a>)
> > I think in the new "Lightroom Interior" the blackness glitch is visible in a
> > more interesting way:
> > <a href="https://www.youtube.com/watch?v=R9N-srsF_Fg">https://www.youtube.com/watch?v=R9N-srsF_Fg</a>
>
> I think I've tracked down what's causing the blackness in all Unreal Engine
> demos: Division by zero.
> </span >
I didn't debug this of course, but it seems suspicious that this would depend
on division be zero returning zero instead of infinity. I don't think any other
driver for current hardware does that with GLSL. Are you sure there's not a
subsequent multiplication by zero that depends on INF * 0 returning 0 instead
of NAN?</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>