Shaders
Installing a shader pack (OptiFine on 1.8.9, Iris on 1.21.11), and fixing low FPS, black screens and odd colours.
Installing a shader pack
- Iris is already included, so there is nothing to install.
- Put the shader pack's .zip in the profile's
shaderpacksfolder. - In game: Options, Video Settings, Shader Packs, and pick it.
Problems
| Problem | Fix |
|---|---|
| Very low FPS | Shaders are the heaviest thing you can turn on. Use the pack's Low or Medium profile, lower render distance, or turn it off for PvP. |
| Black or white screen, or a crash | Update your graphics drivers. Try another shader pack to see whether it is that one. |
| Some Sour colours look wrong | A few Sour overlays are drawn differently under a shader. Turn the shader off to check; if it is clearly a Sour problem, open a ticket with the pack's name. |