<p>During the time range in which the dissolve occurs, split the clip on A, place that segment on a track above B, and apply a mask on A so that C shows through. You can do this by creating a mask to show the C region and then invert it.</p>

CC BY-SA 3.0
2015-12-30T16:21:58.550Z
2015-12-30T16:21:58.550Z
Gyan
<p>Ok, I've got a question which is pretty hard to explain.</p>

<p>I'm using Premiere Pro CC to produce a short movie.</p>

<p>Here's a picture describing (or at least trying to) my set:
<a href="https://i.sstatic.net/0Tg3l.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/0Tg3l.png" alt="Picture describing my set"></a></p>

<p>"A" is the main track. "B" is the second track which I placed in the bottom right corner and "C" is an opacity mask on that track. On this track I've used <em>Ultra Key</em> to remove the background. I've also added a <em>Cross Dissolve</em> effect on "B".</p>

<p>So here's the problem. During the cross dissolve the mask ("C") shows in the middle of screen ("D").</p>

<p>Is this a bug or am I doing something wrong? How do I remove "D"?</p>

<p>Thanks!</p>

<premiere><effects><mask>
Mask "shadow" showing up in the middle of the scene
bjornlof
# Mask "shadow" showing up in the middle of the scene

(Asked by: username_0 on 2015-12-30)

Ok, I've got a question which is pretty hard to explain.

I'm using Premiere Pro CC to produce a short movie.

Here's a picture describing (or at least trying to) my set:
[![Picture describing my set](https://i.sstatic.net/0Tg3l.png)](https://i.sstatic.net/0Tg3l.png)

"A" is the main track. "B" is the second track which I placed in the bottom right corner and "C" is an opacity mask on that track. On this track I've used *Ultra Key* to remove the background. I've also added a *Cross Dissolve* effect on "B".

So here's the problem. During the cross dissolve the mask ("C") shows in the middle of screen ("D").

Is this a bug or am I doing something wrong? How do I remove "D"?

Thanks!

**Tags:** premiere, effects, mask


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## 1 answers

### Answer by username_1 on 2015-12-30. Score: 0 | Accepted answer

During the time range in which the dissolve occurs, split the clip on A, place that segment on a track above B, and apply a mask on A so that C shows through. You can do this by creating a mask to show the C region and then invert it.


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