fix #52

src/core/index.ts

@@ -8,3 +8,6 @@ export { default as Object3D } from './Object3D'
 export { default as Raycaster } from './Raycaster'
 
 export { default as CubeCamera } from './CubeCamera'
+
+export type { RendererInterface } from './Renderer'
+export type { Object3DInterface } from './Object3D'

src/materials/index.ts

@@ -13,3 +13,5 @@ export { default as Texture } from './Texture'
 export { default as CubeTexture } from './CubeTexture'
 
 export { default as PointsMaterial } from './PointsMaterial'
+
+export type { MaterialInterface } from './Material'

src/meshes/index.ts

@@ -23,3 +23,5 @@ export { default as InstancedMesh } from './InstancedMesh'
 export { default as Sprite } from './Sprite'
 
 export { default as Points } from './Points'
+
+export type { MeshInterface } from './Mesh'