I am wondering if there is any games on the market where the visibility of the player is modelled on their projection upon the eyes of the enemies. The more fr

I am wondering if there is any games on the market where the visibility of the player is modelled on their projection upon the eyes of the enemies. The more frame-by-frame difference there is of that projection, the more visible you are. Seems like possibly quite a resource-hungry solution. Or maybe not?