Line Of Sight

To precisely determine whether there is line of sight
between two spaces, pick a corner of one space and
trace an imaginary line from that corner to any part
of another space. If at least one such line doesn’t pass
through or touch an object or effect that blocks vision such
as a stone wall, a thick curtain, or a dense cloud of
fog-then there is line of sight.

Line Of Sight

New Frontiers Fovelis