[LoS when on terrain and there's interposing terrain]

22 hours ago, Negoldar said:

The size of the viewer, Spider-Man in your example, is not considered. The only things that matter are the size of the other character and the size of the terrain features between the two characters. 

In this case, if the other character is size 2 or smaller, LOS cannot be drawn to it. 

The other character can draw line of sight to Spider-Man as he is size 4 for line of sight purposes behind a size 3 terrain feature. 

Thanks for the clarifications!
The rules seemed counter-intuitive

[LoS when on terrain and there's interposing terrain]

Let's say that I have Spiderman (size 2) on top of a container (size 2). He's targeting a hero and between the two there is a shop (size 3). 

The rules state that "A character on top of a terrain feature ignores that terrain feature when determining if it has LOS to another character or object."

Does this mean that it doesn't use the added height to determine if it sees the target? Do I treat this like size 2 tries to target a size 2 that's behind a size 3 object? Or a size 4 that tries to target a size 2 behind an object that's size 3?