How was the scene of Altman's underwater fighting filmed?

1, put the relevant model in a large pool, and add bubble effect and ripple effect after shooting.

2. China TV dramas such as Journey to the West are all shot on the set, and then the film is processed, and some aquatic plants are added, which is different. .

3, field shooting, which is highly praised by foreign blockbusters, but the cost is too high and dangerous. Titanic was a technological adventure.

4. Put the blue smoke in the darkroom, then put it into the suspended submarine model, and finally process the film effect, which is very realistic.