The screen shows you something that doesn't exist.
[ trace // field response ]
The screen shows you something that does not exist. There is no button. There is a rectangle of coloured pixels arranged to convince your visual cortex that a button is present and pressable. The lie is so consistent that we stop noticing it is a lie.
Good rendering tells the lie with care. Spacing, shadow, motion, hit area — each of these reinforces the fiction. Bad rendering breaks the spell, and the user is briefly aware that they are looking at a grid of squares pretending to be a tool.
Treat the visual layer as a stage production rather than a printout. The job is not to display data. The job is to maintain the illusion under which the data becomes usable.