The realization space is
  [1   1   0   0   1   1        0    1                    x2 - 1            x1*x2 - x2^2 + x2 - 1           x1*x2 - x1 - x2^2 + x2]
  [1   0   1   0   1   0   x2 - 1   x2   -x1*x2 + x1 + x2^2 - x2    x1*x2^2 - x1*x2 - x2^3 + x2^2    x1*x2^2 - x1*x2 - x2^3 + x2^2]
  [0   0   0   1   1   1       x1   x1             -x1^2 + x1*x2   x1^2*x2 - x1*x2^2 + x1*x2 - x1   x1^2*x2 - x1*x2^2 + x1*x2 - x1]
in the multivariate polynomial ring in 2 variables over ZZ
avoiding the zero loci of the polynomials
RingElem[x1, x1 - 1, x2, x1^2*x2 - 2*x1*x2^2 + 2*x1*x2 - x1 + x2^3 - x2^2, x2 - 1, x1^2 - x1 - x2^2 + 2*x2 - 1, x1 - x2 + 1, x1^2 - x1*x2 + x2^2 - x2, x1*x2 - x2^2 + x2 - 1, x1^2*x2 - 2*x1*x2 - x2^3 + 3*x2^2 - 2*x2 + 1, x1*x2 - 1, x1 - x2, x1^2*x2 - x1*x2^2 + x2^3 - 2*x2^2 + 2*x2 - 1, x1 - x2^2 + x2 - 1, x1^2*x2 - x1*x2 - x1 - x2^3 + 2*x2^2 - x2 + 1, x1*x2^2 - 2*x1*x2 - x2^3 + 2*x2^2 - x2 + 1, x1 + x2 - 1]