Loé's Night Vision is a shader pack. It only runs through a shader loader such as Iris or OptiFine, so that loader must be installed and working first.
Enabling the pack
1. Start Minecraft with your shader loader active.
2. Open Options → Video Settings → Shader Packs. The exact button name differs slightly between Iris and OptiFine.
3. Make sure the pack file is in your shaderpacks folder. Most loaders have a button on this screen that opens the folder for you. Shader packs go in shaderpacks, not resourcepacks.
4. Select Loé's Night Vision in the list.
5.
Confirming it's running
Load into a world. You should notice these changes right away:
- The whole screen is tinted bright green. It should look like you're peering through night vision equipment.
- **Dark areas are lit up. Spaces that would normally be pitch black should be easy to see.
- Harsh shadows are gone. Corners and overhangs no longer hide mobs or players.
- Subtle screen effects appear. These overlays mimic a digital goggle display.
If the world still looks normal, go back to the Shader Packs screen. Check that the pack is actually selected and that shaders aren't switched off globally. If the pack doesn't show up in the list at all, check that it's in the correct folder and reopen the menu.