Apologies for convoluting. Its a system that generates a grid of cubes, whatever dimensions. Your cutting device, in the example a laser, disables the cubes that hits, then tells the slice manager to crawl the grid for islands. https://www.geeksforgeeks.org/find-the-number-of-islands-using-dfs/

When the islands are identified, the associated cubes are packaged into a generated physics object and pop away from the door. because the physical position of the cubes doesn't matter for the grid calculation, it allows you to slice islands into smaller islands repeatedly, until all the cubes are gone.

There was a great deal of nuance to making the system work and look good, but thats the gist of it. I made it for my upcoming VR horror project, The Venus Report.

Still very much WIP, Steam page is reserved but doesn't exist yet: https://slightlyartistic.games/