/**
 * Global configuration for the three-blocks library.
 * Provides a light-weight singleton store with explicit getter/setter APIs
 * so consumers can toggle runtime optimizations.
 */
/** Runtime optimizations used by internal helper utilities. */
export interface OptimizationOptions {
    /**
     * When true, helper utilities like `uniformPlus` try to convert uniform
     * values into const nodes to reduce uniform bandwidth.
     */
    uniformToConst: boolean;
}
/**
 * Returns the current optimization options.
 * @returns {OptimizationOptions}
 */
export declare function getOptimization(): OptimizationOptions;
/**
 * Updates optimization options. Missing fields keep their previous values.
 */
export declare function setOptimization(next?: Partial<OptimizationOptions>): OptimizationOptions;