Hallecu Shaders is a shader pack. It does nothing until a shader loader such as Iris or OptiFine runs it. It goes in the shaderpacks folder, not the resourcepacks folder.
Activating the pack
1. Launch Minecraft with your shader loader installed.
2. From the title screen or the pause menu, open Options → Video Settings → Shader Packs.
3. Click Open Shader Pack Folder. Put the Hallecu Shaders file in this folder. Leave it zipped if it came as a zip.
4. Go back to the Shader Packs screen. The pack should now appear in the list.
5. Select it and click Apply or Done.
6. Load a world.
How to tell it's running
The change should be obvious straight away:
- Normal terrain looks surreal and dreamlike instead of vanilla.
- The sky and lighting use unusual colour palettes. Check both daytime and night.
- Blocks and water surfaces have a wavy, distorted look.
If your world still looks like plain vanilla, go through these checks:
- The pack isn't in the list. It was probably put in the resourcepacks folder by mistake. Move it to shaderpacks.
- It's listed but nothing changed. Make sure you selected it and applied it, not just highlighted it.
- There's no Shader Packs button. Your loader isn't running. Relaunch using the loader's game profile.