<p>Had the same problem. Put a black solid in the background. It worked for me.</p>

CC BY-SA 3.0
2016-04-14T08:44:11.160Z
2016-04-14T08:44:11.160Z
Ruben Monteiro
<p>was wondering if any of you knew how to fix this issue. When I render my comp in After Effects, I see these weird glitches in the render (like black triangular spots of missing video).</p>

<p>I have uploaded an example of the issue here: <div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/U6JlYaAqJQg?start=0"></iframe>
            </div></div></p>

CC BY-SA 3.0
2016-03-13T04:24:14.753Z
I had something similar recently and - sorry to say - didn't find a solution. I assume in my case it was / is a bug in the effect used. It had to do with masks / alpha channel but since I needed to use a specific mask, I couldn't work around the bug.
Hans Meiser
<after-effects><animation-rendering>
Weird glitches in After Effects render
CJT3
# Weird glitches in After Effects render

(Asked by: username_0 on 2016-03-13)

was wondering if any of you knew how to fix this issue. When I render my comp in After Effects, I see these weird glitches in the render (like black triangular spots of missing video).

I have uploaded an example of the issue here:

**Tags:** after-effects, animation-rendering

> **Comments:**
> **username_1**: I had something similar recently and - sorry to say - didn't find a solution. I assume in my case it was / is a bug in the effect used. It had to do with masks / alpha channel but since I needed to use a specific mask, I couldn't work around the bug.  

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## 1 answers

### Answer by username_2 on 2016-04-14. Score: 1

Had the same problem. Put a black solid in the background. It worked for me.


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