Width, Height anf Depth is the world we live in: X, Y, Z. We should have no trouble visualizing that. Then it gets harder. Then you have Away which is the home of the omnia which is everywhere: ∞. Then the Quasi-Mirrors: X', Y', Z'. Dimensions like our own but a membrane on the 'their' side of the omnia. Ghop that up into an infinite cube of cubes. Each one is three cubes rotated on the three axises but in the same space. This forms 9 dimensional hypercubes. And the omnia being only a single dimension as it is already infinite. Yet somehow counting as three dimensions. For the life of me I can't figure that out. But I can picture it via the very simplistic diagram in my head. A cut away that ignores pixelation and frame choices and extra dimensions and is simply a smooth slice of omnia (always yellow in the diagrams for some reason) with a skin of blue energy on the top and bottom. The sides are just cutaways. Much like most cutaway diagrams, very simplified and technically inaccurate but quite useful for understanding.

Okay so far? Really?

Now to the barrier on the edge of a pixel of the eververse. Something very mathematically close to our current understanding of the fabric of spacetime which is our 3D world. Picture that pixel as a cube in a 3D lattice of cubes (dimensions within dimensions.) And all of that is but a single frame of choice. The end to end collection of frames is the final tenth dimension.

Everything is Pixelated

Initially I had trouble with the idea that something infinite could be pixelated. That would mean there would be gaps in the structure no matter how small. But infinite doesn't have to mean full. There are an infinite number of odd numbers but that still leaves space for all the even numbers.

Presently we know matter is pixelated. We are pretty sure that the fabric of space is pixelated. And many are theorizing that time is pixelated.

In Sid's time that is all a given, and the dimensional membranes and even omnia itself is pixelated. Pixelation seems to be a fundamental property of everything. 

Last one coming up. Ready?