Step 4: What is a LED cube
Since it is a lot more work making a LED cube than a LED display, they are usually low resolution. A LED display of 8x8 pixels is only 64 LEDs, but a LED cube in 8x8x8 is 512 LEDs, an order of magnitude harder to make! This is the reason LED cubes are only made in low resolution.
A LED cube does not have to be symetrical, it is possible to make a 7x8x9, or even oddly shaped ones.