What is the importance of visual effects in the movie?

These days VFX is the most advanced technology used in movies to give the scene a more realistic look.Visual effects involve the integration of live-action footage and generated imagery to create environments which look realistic, but would be dangerous, expensive, impractical, or simply impossible to capture on film.

Let’s look at these examples:

• NOW YOU SEE ME:

To this:

From this:

Before:

After:

From this :

To this:

source:NOW YOU SEE ME | Projects | Rodeo FX

• X-MEN — APOCALYPSE:

Before-

After-

Before-

after-

• The Maze Runner:

Before:

After:

• The Martian:

Before:

After:

source:17 favorite movies before and after visual effects

Incredible before and after images of the visual effects in ‘The Martian’

• Kick:

• Ashiqui 2:

• Happy New Year:

source:31 Before And After VFX Shots From Bollywood Movies That Will Leave You In Shock — Storydunia

Thanks.