Is photometry what is typically actually used for rendering (e.g. via ray tracing) to account for human perception?
Do nighttime and daytime scenes in things like video games actually perform this conversion depending on the time of day? And if so, do they recompute the color output depending on the time of day or is there some sort of conversion that you can do to simplify?
does the translation between radiometric quantities and photometric quantities only involve the response of human visual system function, V?
Is this why most games ask you to calibrate the brightness until a symbol can be faintly seen on the screen?