Abstract: A design system includes a design engine for generating designs, an evaluation process for evaluating the generated designs based on human visual inspection and/or domain knowledge, and an optimization process for pruning based at least in part on the evaluation. Generation of additional designs is performed based on optimization. Newly-generated designs are then subjected to the same iterative steps. In one embodiment a simulator is also used to evaluate the generated designs, in part, with numerically designed specification. Subjective human evaluation is used fully or at least in part of an optimization process to obtain final designs. Human visual inspection and domain knowledge is used to evaluate and rate key designs at different points in the evolution of a design.