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    // Example shader optimization techniques:
    // 1. Use low precision types (e.g., mediump, lowp) for variables where high precision is not needed.
    // 2. Minimize the use of complex mathematical functions (e.g., sin, cos, pow).
    // 3. Reduce the number of texture lookups by combining textures or using atlases.
    // 4. Simplify lighting calculations, possibly using baked lighting where appropriate.
    // 5. Use conditional compilation to exclude unnecessary code paths for specific platforms.
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