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Message: <blockquote data-quote="mattdm" data-source="post: 4443048" data-attributes="member: 15382">The idea that light sources project a perfect square of even light which stops exactly at its border is an abstraction to reduce the need to fumble about with sines and cosines in combat. Take it as: for the purposes of resolving combat, your torch is making this area bright enough to fight in without penalties. For all other purposes, a light source acts as it really would.So, the answer to how to treat the light falloff issue depends on what exactly the question is — is it about being able to see some detail, or is it about combat modifiers?If the absolute line still bothers you, I suggest making the last square (or the square just outside) of the area of a bright light source be dim light. Way easier to keep track of than the (more accurate to be sure) double-radius dim light 3E approach.The abstraction is particularly good for moving light sources. For static sources — terrain features, basically — I suggest making bright, dim, and dark be where it makes sense. We did this in my game last session and no one seemed bothered by the fact that I was using slightly different rules for the light from the bonfire than for light from the torches people were holding.</blockquote>