Geometric - This is the default. With this option, the prism height of a particular layer is defined by h*r^(n-1), where h = initial height, r = height ratio, and n = layer number. The total height at layer n is: h(1–rⁿ)/(1–r).

Exponential - With this option, the prism height of a particular layer is defined by h*e^(n-1)p, where h = initial height, p = exponent, and n = layer number.

Linear - With this option, the prism height of a particular layer is defined by h(1+(n-1)(r-1)), where h = initial height, r = height ratio, and n = layer number. The total height at layer n is: nh((n-1)(r-1)+2)/2.