/** Internal PBR projection helpers shared by legacy overrides and owned materials. */
import type { PBRMaterial } from "@babylonjs/core/Materials/PBR/pbrMaterial.js";
import type { BaseTexture } from "@babylonjs/core/Materials/Textures/baseTexture.js";
import { Texture } from "@babylonjs/core/Materials/Textures/texture.js";
import { Color3 } from "@babylonjs/core/Maths/math.color.js";
import type { Scene } from "@babylonjs/core/scene.js";
import type { MaterialOverride, MaterialRuntimeProperty, MaterialTextureSlot, TextureReference } from "@skenora/contracts";
export declare function applyPbrOverride(material: PBRMaterial, override: Readonly<MaterialOverride>): void;
export declare function setPbrMaterialProperty(material: PBRMaterial, property: MaterialRuntimeProperty, value: unknown): void;
/** Preflight without writes so a caller can validate every material instance. */
export declare function preparePbrMaterialProperty(material: PBRMaterial, property: MaterialRuntimeProperty, value: unknown): () => void;
export declare function createTexture(scene: Scene, url: string, reference: Readonly<TextureReference>, name: string, callbacks?: {
    onLoad: () => void;
    onError: () => void;
}): Texture;
export declare function readTextureSlot(material: PBRMaterial, slot: MaterialTextureSlot): BaseTexture | null;
export declare function assignTextureSlot(material: PBRMaterial, slot: MaterialTextureSlot, texture: BaseTexture | null): void;
export declare function readManagedReference(texture: Texture): TextureReference | null;
export declare function toColorValue(value: Color3): {
    r: number;
    g: number;
    b: number;
};
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