Humans are the most challenging aspect of computer graphics due to our evolved ability to detect patterns, faces, and emotions, which makes capturing realistic human representations difficult.

Creating realistic human faces in computer graphics requires advanced hardware and techniques, including high-resolution video capture and understanding the nuances of facial expressions and muscle movements.

Getting human faces right in computer graphics involves the interplay of numerous systems; if any aspect is incorrect, it can lead to an uncanny valley effect, making the representation feel off.

Rendering objects at extreme close-up and far away distances requires generating the right amount of geometry to be indistinguishable from reality without excess.

The realism in computer graphics comes from the collaboration of artists and technical artists who build environments, utilizing multiple technical features that work together to create stunning visuals.

Subsurface scattering is crucial for realistic skin rendering, as human skin is not completely opaque; light penetrates and scatters, affecting our appearance significantly.

The smallest object that can simulate a human is the human itself, and simulating complex systems like weather or human behavior is nearly impossible with conventional computers.

The subtlety of human expressions, such as the difference between a real smile and a fake smile, is essential to capture in computer graphics, as it conveys deep emotional nuances.

Rendering a perfect single frame is easier than rendering a series of frames in motion that look perfect, as earlier algorithms often resulted in visible transitions between different triangle counts.