For the best "uncanny valley" effect, try fullscreen mode (press G) and then try different zoom levels (press Z) to find the one that look closest to the real h

For the best "uncanny valley" effect, try fullscreen mode (press G) and then try different zoom levels (press Z) to find the one that look closest to the real human head size on your monitor. If your GPU is fast, you can also try ultra mode (should be autodetected, but you can force it by presssing U even if detection fails).