The most impressively prolific exploration of superstring models (aiming for our physical reality) has been focused on worldsheet-supersymmetric gauged linear sigma models and the closely associated complex-algebraic toric geometry. Mirror duality relates this to the inherently real symplectic geometry of Calabi–Yau factors in spacetime, implying a need for a more general, heterotic framework of analysis. In turn, a closer look at possible deformations even among the complex-algebraic complete intersections and toric geometry models themselves indicates an a priori non-algebraic type of generalization that, however, perfectly aligns with the requirements of mirror duality.
Tristan Hübsch (Tue,) studied this question.