Maintain Smooth Performance While Using the Shader

Lower Quality Settings for Weaker Hardware

Vivid Radiant Combat Shaders work on both Iris and OptiFine, but shader quality impacts frame rate. Open your shader options and look for quality presets (often labeled Low, Medium, High, or Ultra).

Start with a lower preset and increase gradually until you notice frame drops during combat. Most players find Medium quality offers the best balance between visual clarity and performance.

Reduce Shadow and Lighting Complexity

Many shader packs include toggles for shadow quality and dynamic lighting. Disable or reduce these if your frame rate dips below your target (typically 60 FPS for smooth combat).

Disabling advanced shadows won't remove the enemy-spotting benefits—the shadow-lifting feature will still work.

Adjust Render Distance and Chunk Updates

Lower your render distance to 12–16 chunks if using shaders. This keeps distant enemies visible through the shader's clarity enhancement while reducing GPU strain.

If your game stutters, enable "Fast Render" or "Chunk Update" optimization in your mod loader settings (Iris or OptiFine). This prioritizes smooth frame delivery over perfect visual fidelity.