What color do you get if you mix equal parts of yellow and blue?

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art. 

Idk but maybe a camera?

Ilearned in arecent video that was a main tour of israel that it's not just a simple town. it's a town with deep secrets and many wonderous places to visit. isreal has a lot of christian tolerance and it holds a lot of history.