<p>You can add a new <strong>adjustment layer</strong> at the top of your composition, with the Levels effect set to the following:</p>

<ul>
<li>Input Black: <code>254</code></li>
<li>Input White: <code>255</code></li>
</ul>

<p><img src="https://i.sstatic.net/lYRgr.jpg" alt="Levels effect"></p>

<p>This will have the result of causing any luma values that were below 254 to become <strong>black</strong>, while anything above it becomes <strong>white</strong>. Here is an example of it over a fractal noise pattern:</p>

<h3>Before</h3>

<p><img src="https://i.sstatic.net/MZNxp.jpg" alt="Before image"></p>

<h3>After</h3>

<p><img src="https://i.sstatic.net/CnOPx.jpg" alt="After image"></p>

CC BY-SA 4.0
2020-05-11T01:18:48.217Z
2020-05-11T01:18:48.217Z
Allen Ellis
<p>I don’t think there’s a way to get zebras on your output, but the Lumetri Scopes will give you a video signal that will show you whether your luma is too high. </p>

<p><a href="https://www.premiumbeat.com/blog/color-correcting-video-lumetri-scopes/" rel="nofollow noreferrer">https://www.premiumbeat.com/blog/color-correcting-video-lumetri-scopes/</a></p>

CC BY-SA 4.0
2020-05-05T09:37:45.280Z
Unfortunately, they're not helping. I need to know exactly where in the image the luma is clipping. I have demonstration-videos shot on white background and I need to make that background be absolute white (255,255,255).
Birowsky
CC BY-SA 4.0
2020-05-05T10:00:47.827Z
I would adjust the levels on the shot until I can see that the Luma levels are at absolute white on the scopes.
tomh
CC BY-SA 4.0
2020-05-05T06:16:46.323Z
2020-05-05T06:16:46.323Z
tomh
<p>Where do I find the luma range clip indicator that I have in Final Cut?</p>

<p><a href="https://i.sstatic.net/7YXW8.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/7YXW8.png" alt="enter image description here"></a></p>

<p><a href="https://i.sstatic.net/CmAsF.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/CmAsF.png" alt="enter image description here"></a></p>

<premiere><after-effects><final-cut-pro-x><adobe><final-cut-pro>
How to range-check luma in After Effects?
Birowsky
# How to range-check luma in After Effects?

(Asked by: username_0 on 2020-05-04)

Where do I find the luma range clip indicator that I have in Final Cut?

[![enter image description here](https://i.sstatic.net/7YXW8.png)](https://i.sstatic.net/7YXW8.png)

[![enter image description here](https://i.sstatic.net/CmAsF.png)](https://i.sstatic.net/CmAsF.png)

**Tags:** premiere, after-effects, final-cut-pro-x, adobe, final-cut-pro


---

## 2 answers

### Answer by username_1 on 2020-05-11. Score: 1 | Accepted answer

You can add a new **adjustment layer** at the top of your composition, with the Levels effect set to the following:

* Input Black: `254`
* Input White: `255`

![Levels effect](https://i.sstatic.net/lYRgr.jpg)

This will have the result of causing any luma values that were below 254 to become **black**, while anything above it becomes **white**. Here is an example of it over a fractal noise pattern:

### Before

![Before image](https://i.sstatic.net/MZNxp.jpg)

### After

![After image](https://i.sstatic.net/CnOPx.jpg)


---

### Answer by username_2 on 2020-05-05. Score: 0

I don’t think there’s a way to get zebras on your output, but the Lumetri Scopes will give you a video signal that will show you whether your luma is too high.

<https://www.premiumbeat.com/blog/color-correcting-video-lumetri-scopes/>

> **Comments:**
> **username_0**: Unfortunately, they're not helping. I need to know exactly where in the image the luma is clipping. I have demonstration-videos shot on white background and I need to make that background be absolute white (255,255,255).  
> **username_2**: I would adjust the levels on the shot until I can see that the Luma levels are at absolute white on the scopes.  

---

