The receding lines do ultimately form triangles except they never extend to a point. Oh well, it us quite strongly implied and there are all those little ones to qualify. What is most interesting to me are the two different palettes: pastels in the architecture and satureted primaries in the prominent poster. -tv
YB - thank you for the comment. Yes - there is no dominant triangle. Instead, there are a hundreds of them on the bottom. I think, this should be on topic.
Konstantin.