How to shoot the weightless scene in Inception?

Not all computer special effects! On the contrary, the film director has always rejected computer special effects, and Nolan believes in the creed of "what is filmed is true"! !

There is only one way for that weightless scene-hang Weiya, and then erase the lines with computer special effects after shooting. But because this film pursues the effect of complete weightlessness, it has to hang a lot of lines, which is too heavy for the later dicing work! Moreover, the picture effect will not be ideal, so the talented Nolan director thought of another method, that is, to make the whole studio with the ceiling next to the ceiling, under the door and the wall, and the floor next to the floor, and then put the camera horizontally, people still see the ceiling facing up, the floor facing down and the walls all around. In this way, you can use the positional relationship between characters to cover a large part of the lines, which reduces a lot of later painting work, and!

I wonder if the landlord understands?