We have seen a lot of movies which has stunning scenes which are either of fantasy or of science fiction. Even though they may seem unrealistic, they never fail to entertain us. On viewing, these pictures take us into their world and make us feel how they look from the view of the crew. The brains and the answers behind these stunning works are the product of visual effects. They are for short called as VFX.
None of the scenes or the characters we see on the movies is real, they are shot with advanced equipment and actors and they are later edited in computers on the stage of post production. It involves actors dressed in special dresses and equipment who are transformed into different being of different sizes with the help of trained VFX crews.