Why does the design for most 3D art starts if as 2d art

"im only a crack in this castle of glass" what band says this in one of there songs its a project for school dont report. im doing a project on music and bands.

After first arriving in new york, charlie parker took a job as a dishwasher at jimmy's chicken shack, where played the piano nightly. listening to his astonishing harmonic restructuring, virtuoso phrasing, and breakneck tempos every night for three months, charlie parker challenged himself to adopt these qualities into his playing, and he continued to practice tirelessly.

I’m the marriage of giovanni arnolfinj and giovanni cermani painted by jan van eyck the symmetry we may observe is primarily symmetry