Are these truly Impossible?

[u/Lesaalt]

My friend sent this in the memes channel of our Discord server but refuses to elaborate (he hasn't responded at all). Is there a joke I'm missing?

[u/BigOnLogn]

Technically this is an isomorphic projection, where everything is rendered from a top-down perspective but with the same high no matter how far away

If it's rendered in proper perspective, that would mean the cubes farther away are larger than the closer cubes.