The gray eliptical line controls the space of this grid.
From this variation on two-point perspective systems, two types of grid field developes.
The orange and yellow central grid has a relatively normal pregression back into space.
But it is the two grids below it that is generating it. And these spaces are not quite normal.
They "overlap"in the center, and they seem to compress their space along the eliptical line to either side.
There are at least two coherent ways to read this space grid.

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