Here's a quick tutorial to Blender. Show how to use Gradien Texture to model the earth with slices. The instructions are ...

Abstract: Large-scale multi-objective optimization problems (LSMOPs) pose challenges to existing optimizers since a set of well-converged and diverse solutions should be found in huge search spaces.

All gradients can be downloaded and used for free Commercial and non-commercial purposes No permission needed (though attribution is appreciated.) ...