Answers.Body: <p>I figured it out. You have to apply the mask and background with a merge node after the original composite using the tracking data like this:</p>
  <p><a href="https://i.sstatic.net/QtK4B.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/QtK4B.jpg" alt="Solution image" /></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-06-10T08:40:09.420Z
Answers.LastActivityDate: 2021-06-10T08:40:09.420Z
Answers.UserDisplayName: Peter
Body: <p>I'm having problems trying to apply a polygon mask to a planar tracking media which is UHD. My project is HD and my background image (the building) is also UHD. My tracking window and mask look like this:</p>
  <p><a href="https://i.sstatic.net/u6MeX.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/u6MeX.jpg" alt="Fusion mask and planar tracker" /></a></p>
  <p>Then when I attach the polygon mask it gets scaled like this:</p>
  <p><a href="https://i.sstatic.net/fuLN8.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fuLN8.jpg" alt="Fusion mask and planar tracker squashed" /></a></p>
  <p>How can I resize the media or the mask so it fits my background?</p>
  
Tags: <davinci-resolve><mask><fusion>
Title: Davinci Fusion Planar tracking, effect mask distorted size
UserDisplayName: Peter
ThreadText: # Davinci Fusion Planar tracking, effect mask distorted size
  
  (Asked by: username_0 on 2021-06-02)
  
  I'm having problems trying to apply a polygon mask to a planar tracking media which is UHD. My project is HD and my background image (the building) is also UHD. My tracking window and mask look like this:
  
  [![Fusion mask and planar tracker](https://i.sstatic.net/u6MeX.jpg)](https://i.sstatic.net/u6MeX.jpg)
  
  Then when I attach the polygon mask it gets scaled like this:
  
  [![Fusion mask and planar tracker squashed](https://i.sstatic.net/fuLN8.jpg)](https://i.sstatic.net/fuLN8.jpg)
  
  How can I resize the media or the mask so it fits my background?
  
  **Tags:** davinci-resolve, mask, fusion
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2021-06-10. Score: 0 | Accepted answer
  
  I figured it out. You have to apply the mask and background with a merge node after the original composite using the tracking data like this:
  
  [![Solution image](https://i.sstatic.net/QtK4B.jpg)](https://i.sstatic.net/QtK4B.jpg)
  
  
  ---
  
  