Custom Outline lets you change the colour, opacity and thickness of Minecraft's block selection outline.
By default, it comes with the color #ffcc00 
Web Generator
The easiest way to create a custom pack is to use the Custom Outline Generator.
Select your settings, choose your Minecraft version, and download the generated pack.
Respackopts Support
Custom Outline v1.1.0 supports Respackopts.
Install Respackopts and LibJF, then open the Custom Outline settings through Respackopts or Mod Menu. From there, you can change the outline colour, opacity, thickness, and animation.
The newest packs use Respackopts format v13 and support the newer preset system. Older packs use format v12, which supports the main settings but not the newer preset-file system.
Manual Editing
You can manually edit the shader if you prefer.
Open:
assets/minecraft/shaders/core/rendertype_lines.vsh
Find the #ifndef respackopts_loaded section and change the colour values:
#define customOutline_outline_red 255
#define customOutline_outline_green 204
#define customOutline_outline_blue 0
#define customOutline_outline_opacity 100
#define customOutline_outline_thickness 1.0Save the file and press F3 + T in Minecraft to reload the pack.
Rainbow Outline
To use the rainbow animation, replace:
#define customOutline_outline_mode_staticwith:
#define customOutline_outline_mode_rainbow⚠️ Compatibility
Custom Outline is not compatible with shaderpacks that replace Minecraft's core shaders, such as Iris or OptiFine shaderpacks.
If you want to use shaders with a custom outline, use a shaderpack with its own outline settings, such as:
Troubleshooting
The pack is marked incompatible
Make sure you are using the version selected for your Minecraft installation.
The settings menu is missing
Install Respackopts and LibJF for your Minecraft version, then restart the game.
The outline has not changed
Make sure Custom Outline is enabled and press F3 + T to reload the resource pack.
Also check that another resource pack is not overriding the same shader.
The pack stops working after enabling shaders
Shaderpacks may replace the shader used by Custom Outline. Disable the shaderpack or use its built-in outline settings instead.
Need help or have a suggestion?
Reach out on GitHub or join the Support Discord.
License
🎨 Custom Outline is © NotToBlame. You are permitted to:
- ✅ Use it in modpacks if downloaded from official sources such as Modrinth or CurseForge
- ✅ Create and publish addon packs, provided they do not include original Custom Outline files
- ✅ Make personal edits for your own use
You may not:
- ❌ Reupload or redistribute Custom Outline or its assets
- ❌ Include original files in your own uploads or forks
- ❌ Use the pack commercially without explicit permission
All Versions
+ Add Version
- Respackopts Support**
- Updated Pack Icon**
- Respackopts Support**
- Updated Pack Icon**
- Respackopts Support**
- Updated Pack Icon**
- Respackopts Support**
- Updated Pack Icon**
- Respackopts Support**
- Updated Pack Icon**
- Respackopts Support**
- Updated Pack Icon**
- Updated Pack Icon**
pack.png with the new Custom Outline logo.- Legacy Version Support**
- Respackopts support for Minecraft 26.3**
- Manual configuration**
assets/minecraft/shaders/core/rendertype_lines.vsh. Inside the #ifndef respackopts_loaded section, change the fallback values:- Replace
customOutline_outline_mode_staticwithcustomOutline_outline_mode_rainbowto enable rainbow mode. - Edit the red, green, and blue values to change the outline colour.
- Adjust opacity, thickness, rainbow speed, saturation, and brightness as needed.
Save the file and reload the resource pack in Minecraft.
- 26.3 Support**
rendertype_lines.fsh & rendertype_lines.vsh to support the new changes implemented in 26.3-snapshot-5- 1.21.11-pre1 Pack Update**
- 1.21.11-pre1 Pack Update**
- 1.21.9 Pack Format Update**
- 1.21.9 Pack Format Update**
This pack comes pre-setup to have a rainbow outline
This pack comes pre-setup to have a rainbow outline
This pack comes pre-setup to have a rainbow outline
