Answers.Body: <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>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-11T01:18:48.217Z
Answers.LastActivityDate: 2020-05-11T01:18:48.217Z
Answers.UserDisplayName: Allen Ellis
Answers.Body: <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>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-05T09:37:45.280Z
Answers.Text: 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).
Answers.UserDisplayName: Birowsky
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-05T10:00:47.827Z
Answers.Text: I would adjust the levels on the shot until I can see that the Luma levels are at absolute white on the scopes.
Answers.UserDisplayName: tomh
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-05T06:16:46.323Z
Answers.LastActivityDate: 2020-05-05T06:16:46.323Z
Answers.UserDisplayName: tomh
Body: <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>
  
Tags: <premiere><after-effects><final-cut-pro-x><adobe><final-cut-pro>
Title: How to range-check luma in After Effects?
UserDisplayName: Birowsky
ThreadText: # 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.  
  
  ---
  
  