three/examples/jsm/utils/SceneUtils does not work.

[Kyohei-Ishihara]

SceneUtils is defined as namespace in SceneUtils.d.ts.
SceneUtils.js does not support it

[joshuaellis]

Please provide more information with an perhaps a codesandbox example of the issue so we can correctly look into it.

[Kyohei-Ishihara]

import { SceneUtils } from "three/examples/jsm/utils/SceneUtils";

const mesh = SceneUtils.createMultiMaterialObject(geoms[i], materials);

This code can be compiled, but it doesn't work. Error is that SceneUtils not found in three/examples/jsm/utils/SceneUtils (on Terminal). createMultiMaterialObject is not a function(on Console).
The reason is as follows.

• createMultiMaterialObject is defined into namespace(SceneUtils) in SceneUtils.d.ts.
• But createMultiMaterialObject is not defined into namespace(SceneUtils) on SceneUtils.js.

[b1616]

I believe it may have resulted from this change mrdoob/three.js#22284 which does as @Kyohei-Ishihara described, changing a handful of util functions that were previously defined in classes to being plain functions to facilitate tree shaking.