I would like to have a function in which I can manually select polygons or edges (possibly with CTRL+click the shortest path from the currently selected to the newly clicked one is selected) and then with Fill I can close this area with polygons, possibly also subdivde and thickness, so that all polygons inside are deleted.
I usually do this externally in Blender, and then achieve the one shown below.
Glass surfaces rarely get good, so I usually replaced the holes and “badly scanned” areas externally with cubes and subdivide them a few times before I import the new model back into RC for texturing.
The result below speaks for itself, the upper “destroyed” image is RC original output and in the lower one I replaced the surface with a cube.