Space zombies Building Pixel (Ufloor)

thingiverse

Here is the last main component, designed to be the least decorated due to geometric constraints but packed with intriguing functionalities. The Ufloor is engineered to create a basic roof for any cube without requiring an additional unit stacked on top, or close off access to one of its other opened lateral faces, and it even allows stacking cubes upside down. If you aim for a fully cubic and symmetrical building, the Ufloor will also enable you to create an intermediary floor while keeping potential internal discs securely locked in place vertically, preventing them from unexpectedly moving inward and knocking over your models. Remember to set these internal discs in place after installation. If you already have a Cube and a Disc, simply print one, and its purpose will become evident once it's in your hands. https://www.thingiverse.com/thing:4551664