How did the movie Trainspotting get into the toilet?

The computer special effects must be used.

From the appearance of the toilet, it is known that it can't pass.

It is estimated that a ring the size of a toilet should be made in front of the blue screen.

Then the background of the toilet should be cut in.

It's not difficult if there is equipment and technology.

If the close-up lens is misplaced,

It's definitely not possible to take it from the side.

You can see it from the distance. People can see that it's a real toilet

and then the shoulder goes in.

Take a picture from the back, that is, the side with the water tank.

Then get something to throw into the toilet and splash some water.

Let the actor stand upside down and kick his leg.

Then make a shot similar to being sucked down.

Faster

The shorter it is, the less likely it is to break.

If.