The basic routine object combinations describes the ability of humans to recognize and sketch/draw/construct intersections of two or more spatial objects, complementary parts of spatial objects and Boolean operations (difference, union and intersection).
Thus, it is not a matter of how the individual parts can be moved in relation to each other in order to be combined into an overall object, but rather to be able to recognize spatial relationships between partial objects as well. Object combinations can result among other things from the Boolean operations (intersections, differences, unions) with other intersections of objects. In the basic routine Object Combinations the analysis and consideration of spatial objects is in the foreground, which are cut off or interpenetrate each other. The considered objects are mostly only partially visible.