How the animation process works in the past?

The animation, Process of giving the illusion of movement to drawings, models, 

or inanimate objects. From the mid-1850s, such optical devices as the zoetrope

 produced the illusion of animation. Stop-action photography enabled the

 production of cartoon films.

The animation in the past was drawing every single frame one by one by hands

to make the character or an effect or anything else to move,

and it was too hard to make and expensive too, from tools and artists and painters..etc

then in the mid of 60th the animation was easier for the artists to make ,

because the producers made the artists to make less animation for the characters 

like the animation of anime.

 And after that all, it being of coloring (painting) process.

After the animators finishing up there animations the next process is painting that live

drawings.

After that again, it is time to capture all that photos by a such a huge and a large cameras .
 

land they use in some scene more than one layer for that drawings and order them like

a virtual layers in photoshop as a an example.

and after that they compose all captured shots in one cinematic rules and make the music and 

mix them and after that they finish the animation movie with a budget about $8MILLION to make

Snow white.