I will do my best.
(P.S. this is my first post, so if I mess up on any terminology, I apologize in advance)
Here is a series of pictures, or a movie, or an optical illusion, or whatnot that appears to break the rules of the "Round Earth Religion." We will call this, for simplicity sake, "the object", whatever it happens to be.
Anyone viewing this object is viewing it on a computer screen.
Turn your screen 90 degrees. You can see that it is a flat screen, or perhaps slightly curved if it is of older design.
My point is that any image viewed on a flat screen is in fact a 2D image - there is no true depth, for parts of an image that appear deepest in the screen are in fact no farther away from your eyes than the rest of the image.
So here is a 2D image, that when interpreted in 3D space, appears to break a few rules.
But it is not 3D, it is 2D, and any apparent "depth" is simply an illusion created by the eyes and the mind. And not necessarily are only objects listed as "optical illusions" create an illusion - any object on any monitor, or piece of paper, is of course, actually merely a 2D image. I hope that both followers of the "Round Earth Religion" as well as the "Flat Earth Religion" can agree to this. If you can't, please let me know.
With the knowledge that this "object" is in fact merely a series of 2D images, it can be said that there are no bars, and there are no blocks, only 2D representations of bars and blocks, using many visual techniques to give the appearance of depth and solidity.
As the "object" is made up of only richly coloured and textured moving shapes, it breaks no "Round Earth Religion" rules, as it is, merely, moving shapes.
And I think that is how the "Round Earth Religion" explains this.