I think it helps build an intuition of how higher dimensions can help us explain physics, if instead of a shadow, you think of projection as a cross-section, li

I think it helps build an intuition of how higher dimensions can help us explain physics, if instead of a shadow, you think of projection as a cross-section, like the ones you see in brain scans, where you only see one "layer" of the brain at a time. Objects that are moved into the plane of the scanner (so they intersect the plane) will essentially "pop into existence" from the perspective of someone looking only at that cross-section - and then that cross-section morphs and changes shape as the object is moved so different parts of it intersect the scanner. What if the same thing is happening when elementary particles pop into existence and later annihilate, that we're seeing the cross-section of a higher-dimensional object as it intersects our 3 dimensions? What if matter and antimatter are like the outer edges of such a cross-section, appearing in a single point as the object touches our plane, moving apart as the bulk of the object passes through our plane, and then finally coming together in a single point before disappearing (annihilation), as the object stops intersecting our plane?