Description
It is the perfectly seamless piston door!
Ok, the perfection is that none of the door blocks are shown in the hallway, so a true seamless.
10 tick opening (and to seamless); 9 tick closing.
Related Schematics

Game of Life - 3x3 cell
Size: 3 x 3 x 20 Volume: 180 blocks Density: 86% (25 air blocks) Speed: 4.8 s/it (~0.2 Hz) Layers: Yellow: Memory Red: Reset Pink: Logic Cyan: Trigger Blue: Neighbor communication Where to find me: Minecraft: cmoa Discord: cmoa_ Reddit: u/cmoa58

8x8 Screen with XY Plotter + buffer
the casual 8x8 Screen with XY Plotter + buffer

2x2x7 per bit, 8 bits binary RAM (combinational)
Small binary cobinational RAM that does not use observers/pistons/1.21 items or anything of sort. MCHPRS compatible. Size: 2x2x7 blocks per bit (stackeable + can be flipped to merge outputs of different modules)In theory possible to get to 6 blocks long due to large amount of air space where the toches are but... probably not too doable tbh Write/Read are on the same glass tower, but still work separately and don't affect one another. Reading and writing to the same byte at the same time is not possible, only one at a time.