Wouldn't it be great to be able to penetrate a wall at any point?
The solution to this problem seems simple:
One cuts a square hole from the air and sets it loosely enough into a surface, so that it can be moved freely.
Now unrestricted access is created to what was left in hiding and the function principle behind the moving pore will becomes comprehensible.
cupboard
200 x 200 x 40 cm.
wood, aluminium, fabric.