Ok, In figure 1 would green 3 have line of sight to red 1?
If he traced line of sight from the Lower left corner of his tile to the upper right and lower right he would be blocked. However if he tried to trace his line of sight from The lower left of his tile to the upper left and right of red 1 he would not be blocked. ( I assumed that tracing line of sight lines that overlap eachother was not allowed)
In figure 2 we have the same scenario but green 3 is adjacent to red 1. Can he trace line of sigt over each other (ie Green 3's lowerleft corner to red 1's upper corners or right corners)
If the assumption I made in figure one is true then green 3 would not have line of sight in figure 2 but that would be illogical. Please let me know what you think and how you play it.