Selecting the Shader Pack
Because Minecraft does not load shaders on its own, make sure you launch the game with a shader loader such as Iris or OptiFine active, and keep the pack inside your game directory's shaderpacks folder. Once you are in a world or on the main menu, follow these steps to turn it on:
1. Open the pause menu and click Options, then Video Settings.
2. Open the Shaders or Shader Packs menu provided by your shader loader.
3. Click Lumen_NM Shaders in the list to highlight it.
4.
Confirming the Visual Changes
Load into a world during the daytime near a river, lake, or ocean to verify everything is working. Because Lumen_NM Shaders uses soft, subtle world-lighting adjustments rather than heavy visual overhauls, the difference is easiest to spot under open sky. Look for sharper daytime contrast across nearby terrain and noticeably clearer water coloration compared to default vanilla water. Your surroundings should appear crisp and bright without causing a heavy drop in gameplay smoothness.