Selecting a Performance Profile
Once FESGlow Shaders is active in your shader loader, you can match its visual load to your computer setup using its built-in performance presets.
1. Press Esc, open Options, and go to Video Settings.
2. Open the Shaders menu (provided by Iris or OptiFine) and select FESGlow Shaders.
3. Open the shader pack settings screen from the menu.
4. Locate the profile or preset option and cycle through the four main tiers: Potato, Low, Medium, and High.
5. Apply the changes and return to your world.
Testing Stability In-Game
Press F3 to open the vanilla debug screen and monitor your frame rate while moving through busy areas or looking at lit builds.
- Pick Potato or Low on modest computers to keep camera movement responsive while keeping the bright cartoon visual style.
- Pick Medium or High if your system holds a steady frame rate and you want fuller colored lighting and clean shadows.
If you still experience frame drops on the Potato profile, lower your vanilla Render Distance and Simulation Distance in Video Settings to reduce the overall scene load alongside the shader.