# False colour overlay

**URL:** https://community.aseprite.org/t/false-colour-overlay/4655
**Category:** Features
**Created:** [January 19, 2020, 7:14pm UTC](https://community.aseprite.org/t/false-colour-overlay/4655 "2020-01-19T19:14:04Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![Gasparoken](https://community.aseprite.org/user_avatar/community.aseprite.org/gasparoken/32/24720_2.png) [@Gasparoken](https://community.aseprite.org/u/Gasparoken)
#### Post date: [January 20, 2020, 12:14pm UTC](https://community.aseprite.org/t/false-colour-overlay/4655/2 "2020-01-20T12:14:21Z")

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Hi David. Did you try a lua script to do this? You can draw on a regular basis (with alpha = 255 on RGB channels), then you can run a script to iterate each pixel and convert its alpha channel to 0.  
Check [Aseprite - Docs - Scripting](https://www.aseprite.org/docs/scripting)  
API [GitHub - aseprite/api: Scripting API for Aseprite](https://github.com/aseprite/api#aseprite-api)  
Examples [Aseprite Script Examples](https://community.aseprite.org/t/aseprite-script-examples/2611)  
Scripts collection [Aseprite Scripts Collection](https://community.aseprite.org/t/aseprite-scripts-collection/3599)  
I hope this helps.

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