hey Omar, there are no objects in the scene other than the camera and the mesh itself. Thank you for being so kind by offering help; here goes the scene https://drive.google.com/file/d/1om6Bd08EBb2JikxzxeTk1PYsfwfUyIUy/view?usp=sharing
Martin, thanks for the tip! I wanted to merge in terms of boolean merge rather than just “grouping” all objects. For instance, in 3ds max, you can do a boolean operation with elements of a single poly mesh object, but in Blender, you can not, as I figured.