Some objects, like trees or cliffs, can block vision. These objects are called Occluders. An occluder must cover the bottom right corner of a cell to be considered as covering the entire cell. The first thing to know how vision is blocked is how the unit is placed around the blocker.
Look at the table below, all pictures are clickable to expand. There are 4 possibilities:
| Position | Mask |
|---|---|
| Straight line |  |
| Diagonal line |  |
| Between a straight and a diagonal line |  |
| On the same cell |  |