How do beveled corner squares affect line of sight?
The do not affect line of sight at all. They affect movement. They are treated exactly as if they are normal corners in regards to line of sight, including the situation where there are two beveled corners directly opposite each other across a corner. In such cases characters don’t have line of sight even if it looks like they might count as adjacent. They are not adjacent, do not have line of sight, cannot attack, and do not give up attacks of opportunity.
