/**
 * Built-in material presets for Studio mode.
 *
 * 31 presets organized by category: metals (polished & matte/brushed),
 * plastics, glass & transparent, rubber & elastomers, painted surfaces,
 * and natural/other materials.
 *
 * These are pure data definitions — no textures, no runtime cost.
 * The `builtin` field is intentionally omitted; it is used by user-defined
 * materials to reference these presets, not by presets themselves.
 *
 * All color values are in sRGB color space (0-1 per channel).
 * The material factory converts sRGB to linear when creating Three.js materials.
 * Presets with neutral color (plastics, paints) rely on the leaf node's
 * color field for the actual tint via fallback in the material factory.
 *
 */
import type { MaterialAppearance } from "../core/types.js";
/**
 * Built-in material presets keyed by preset name.
 *
 * Usage: look up a preset by the `material` tag on a leaf node, or via
 * `"builtin:<name>"` strings in the materials table.
 */
export declare const MATERIAL_PRESETS: Record<string, MaterialAppearance>;
/**
 * Sorted list of all built-in material preset names.
 *
 * Useful for UI dropdowns, validation, and programmatic enumeration.
 * Derived from MATERIAL_PRESETS keys at module load time.
 */
export declare const MATERIAL_PRESET_NAMES: string[];