However, I created the building where I work as a Marathon level in Anvil, and found that it just did not look right visually using that scale. I found that a ceiling height of 1.2 world units looked like 8 feet visually. This means that our hero at .8 world units tall is 64 inches tall, or 5ft 4 inches. This means that each grid square holds 16 pixels of texture data. At a measure of 10 inches per grid square, that means each pixel is 1.6 inches wide.
Desks appear at the correct height visually, the switches appear to be the correct size, etc.
A tree in the wild will grow normally, but when planted in Biosphere 2, the plants grew weakly. The wind in the natural world caused the tree to sway around, building up a strong bark to support it. In the Biosphere 2, there was no such wind, and the trunk was not strong. Anyway, if you were born and raised in space, you'd have little or no resistance to make you into average height. So you'd quickly assume that you'd get bigger.