diff --git a/src/base/TilesRendererBase.d.ts b/src/base/TilesRendererBase.d.ts
index dd3b8f1d4..996d1d304 100644
--- a/src/base/TilesRendererBase.d.ts
+++ b/src/base/TilesRendererBase.d.ts
@@ -1,7 +1,27 @@
 import { LRUCache } from '../utilities/LRUCache';
 import { PriorityQueue } from '../utilities/PriorityQueue';
+import { Tile } from './Tile';
 
-export class TilesRendererBase {
+export type Attribution =
+	| { type: 'string'; value: string }
+	| { type: 'html'; value: string }
+	| { type: 'image'; value: string };
+
+export interface TilesRendererBasePlugin {
+	init?: ( renderer: TilesRendererBase ) => void;
+
+	fetchData?: ( url: RequestInfo, options: RequestInit ) => Promise<Response>;
+	parseTile?: ( content: ArrayBuffer | DataView, tile: Tile, extension: string, uri: string ) => Promise<void>;
+	preprocessURL?: ( uri: string ) => string;
+	preprocessNode?: ( tile: Tile, tileSetDir: string, parentTile: Tile | null ) => void;
+	loadRootTileSet?: () => Promise<void>;
+	disposeTile?: ( tile: Tile ) => void;
+	getAttributions?: ( target: Attribution[] ) => void;
+
+	dispose?: () => void;
+}
+
+export class TilesRendererBase<TPlugin extends TilesRendererBasePlugin = TilesRendererBasePlugin> {
 
 	readonly rootTileSet : object | null;
 	readonly root : object | null;
@@ -20,9 +40,9 @@ export class TilesRendererBase {
 
 	constructor( url?: string );
 	update() : void;
-	registerPlugin( plugin: object ) : void;
-	unregisterPlugin( plugin: object | string ) : boolean;
-	getPluginByName( plugin: object | string ) : object;
+	registerPlugin( plugin: TPlugin ) : void;
+	unregisterPlugin( plugin: TPlugin | string ) : boolean;
+	getPluginByName( plugin: string ) : TPlugin;
 	traverse(
 		beforeCb : ( ( tile : object, parent : object, depth : number ) => boolean ) | null,
 		afterCb : ( ( tile : object, parent : object, depth : number ) => boolean ) | null
diff --git a/src/index.d.ts b/src/index.d.ts
index 8dfe82ea4..61f41f82d 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -1,6 +1,6 @@
 // three.js
 export { DebugTilesRenderer } from './three/DebugTilesRenderer';
-export { TilesRenderer } from './three/TilesRenderer';
+export { TilesRenderer, TilesRendererPlugin } from './three/TilesRenderer';
 export { TilesGroup } from './three/TilesGroup';
 export { B3DMLoader, B3DMScene } from './three/loaders/B3DMLoader';
 export { I3DMLoader, I3DMScene } from './three/loaders/I3DMLoader';
@@ -24,7 +24,7 @@ export * from './three/plugins/DebugTilesPlugin';
 export { ImplicitTilingPlugin } from './base/plugins/ImplicitTilingPlugin';
 
 // common
-export { TilesRendererBase } from './base/TilesRendererBase';
+export { TilesRendererBase, TilesRendererBasePlugin } from './base/TilesRendererBase';
 export { Tile } from './base/Tile';
 export { TileBase } from './base/TileBase';
 export { Tileset } from './base/Tileset';
diff --git a/src/three/TilesRenderer.d.ts b/src/three/TilesRenderer.d.ts
index 1d8fff7af..38ee99e0b 100644
--- a/src/three/TilesRenderer.d.ts
+++ b/src/three/TilesRenderer.d.ts
@@ -1,10 +1,15 @@
 import { Box3, Camera, Vector2, Matrix4, WebGLRenderer, Object3D, LoadingManager, Sphere } from 'three';
 import { Tile } from '../base/Tile';
-import { TilesRendererBase } from '../base/TilesRendererBase';
+import { TilesRendererBase, TilesRendererBasePlugin } from '../base/TilesRendererBase';
 import { TilesGroup } from './TilesGroup';
 import { Ellipsoid } from './math/Ellipsoid';
 
-export class TilesRenderer extends TilesRendererBase {
+export interface TilesRendererPlugin extends TilesRendererBasePlugin {
+	processTileModel?: ( scene: Object3D, tile: Tile ) => Promise<void>;
+	doTilesNeedUpdate?: () => boolean;
+}
+
+export class TilesRenderer extends TilesRendererBase<TilesRendererPlugin> {
 
 	ellipsoid: Ellipsoid;
 	autoDisableRendererCulling : boolean;