Implement the compar feature in UI5

[sh__lee]

Hello,
I am interested in developing a viewport in ui5.
I would like to apply the [visual compare] function in SAP VEV to UI5 viewport.

First of all, I know that ui5 is using the viewport threejs library.
I understand that there is a way to compare two models using the [Three-bvh-csg] library in threejs.
Attached is the link below:
https://discourse.threejs.org/t/three-bvh-csg-a-library-for-performing-fast-csg-operations/42713

Additionally, the VEV attaches the [visual compare] function as an image.
It would be nice if you could give me a hint or help on how I can combine the gray and blue models in the image.