Where and What @ The Galleries

I found another example of what I mentioned in the post below but using photography and showing two different artworks when viewers look at different angles. I haven't seen them in reality, but I read that these large artworks adorn some of the walls at The Galleries at the moment as part of the exhibition 'Where & What'. We were talking last week about how it would be interesting to incorporate some photography somehow and this could be an interesting technique to consider.
Ash