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Terrain: No Simplification VS Interpolate Points * 4
No Simplification Uses all the operands' vertices to create a complex mesh. This results in greater detail and a larger file size than the two fractional options.
Use 1/2 of Points Uses half the set of vertices in the operands to create a less complex mesh. This results in less detail and a smaller file size than using No Simplification.
Use 1/4 of Points Uses a quarter of the of vertices in the operands to create a less complex mesh. This results in the least detail and smallest file size of these options.
Interpolate Points * 2 Doubles the set of vertices in the operands to create a more refined but more complex mesh. This is most effective in terrain forms that use constructive curves such as circles and ellipses. This results in more detail and a larger file size than using No Simplification.
Interpolate Points * 4 Quadruples the set of vertices in the operands to create a more refined but more complex mesh. This is most effective in terrain forms that use constructive curves such as circles and ellipses. This results in more detail and a larger file size than using No Simplification.
There is no definitive answer. The best choice is whatever method best fits you needs and creates the best-looking/most-efficient mesh for that particular model.
Try the various settings, and see which you like.
Another trick to try: Apply a Normalise Spline to the contours before the terrain, and adjust its length value to create a nice terrain mesh. That can help if the contour splines have uneven vertex density or edge length.
