I understand what you're saying, and in your example above it would be absurd to try and hang them pictures , and here comes the "but"
...but, my point is that something "objectively real" has constraints and a certain way of being.
...if we imagine the universe as a large pizza expanding, we can see that the pizza will still have the edges.
Obviously this is a difficult topic to discuss, so I guess using analogies, while smoking weed, is the closest we will get.
you need to open your mind a little. the universe isn't as simple as a pizza with edges. the constraints you put on things are learned throughout your life on this planet. elsewhere in the universe this constraints are turned on their head. it turns out that most things perceived as impossible (to us humans) are not actually impossible.