squint

This is the piece of information I was missing thanks.

Hey I just came across this thread and I'm confused about how this works. In our group we have always played blocking los in 1 direction to another same base size model/marker (if the size of the blocking model or marker is enough to block los obviously the rulebook has an example that supports this) I think this is how most play it, that sets a precedent on how you manage distances of exactly 0. With no other blocking terrain or models and all 3 models or markers being the same base size, there are 2 sight lines that can be drawn that will be tangent to each side of each base, that is an "unblocked" sight line with if the models are arranged horizontally a vertical distance of 0. If a model is standing directly on top of a marker the sight line reaches the blocking model or marker at the same point as reaching the the marker underneath I would have thought it would be blocked. Below are three diagrams the first shows that there are 2 sightlines that do touch the model I would say is cannot be seen from the right model (the shaded blue area between the blocking and blocked model indicates they are in fact touching). The second shows the obvious that if the blocking model has a larger base size there are no touching sight lines (no shaded blue). The third is where the current confusion for me is which is that they are both are reached at the same point given los drawn touching a blocking element blocks up to and including the size of the base in the first case I don't understand why it would be any different here.