“The king’s men flew that dragon into Baldur’s Gate — Dragonfire can’t melt marble pillars! And don’t get me started about the Elminster Assassination!” — Gribble of the Dale
Vision rules in 5e are often time-consuming to implement on the fly. Lights stretch out to x-number of feet in multiple states of brightness, and the areas revealed are changed as people move their characters. This is fantastic for a computer game – or as a feature of certain online tabletop environments – but in person, the distances that characters can see are often best-guessed, ignored completely, or worse, counted out one tile at a time during a disagreement about the rules.
This document tries to make the vision rules more intuitive by removing the need for distance calculations as well as seeking to be more inclusive by having the key-word for detecting creatures and objects being to sense.