Retroview is designed to keep the game running smoothly because it uses the basic graphics engine. If the retro look is missing or your frame rate drops, check the following.
The retro look isn't appearing
1. Check the Selected list. Open Options > Resource Packs and confirm Retroview is on the right side, not just in the Available list.
2. Check pack order. Move Retroview to the top of the Selected column so no other pack overrides it.
3. Reload resources. Press F3 + T in-game to reload all packs without restarting.
4. Turn off competing shaders. If you use a separate shader loader with another pack active, disable that pack so it doesn't cover up Retroview's lighting and colors.
5. Confirm the file location. Use Open Pack Folder to check that the Retroview file is actually inside resourcepacks.
The game feels slow
Retroview itself is meant to be lightweight, so a slowdown usually comes from somewhere else:
- Lower Render Distance and Simulation Distance in Video Settings.
- Disable other resource packs one at a time to see whether one of them is heavy.
- Turn off any additional shader pack running through a loader.
- Press F3 to watch your frame rate while you change settings.
If performance only improves when Retroview is turned off, compare a few vanilla video settings with it on. Lowering render distance and reducing particles are good places to start.