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