Nostalgia in using pixels as a limitation system in video games is not just a nostalgic choice but also a choice of precision. Hardware memory per scanline was previously the constraining factor on each colour of a sprite palette, instead of depending on aesthetic choices. Modern 2D Game Asset Design Services still adhere to this discipline. Everything should conform to one fixed angle of light source which is usually 45 in the top-left corner. That way, shadows will appear natural as one plays the game.
