Mountains, rendered as graphics layers, masked by six possible textured image layers, placed on a canvas. Each texture is generated fresh; there are no image files used. These textures are created in varying shades of gray, and shadows and some posterization added for further texture.

Features include…

Population: Sparse, few, some, many. Basically, the number of mountains.
Width: Narrow, Thin, Medium, Wide. This is the width of the mountain base. All of them narrow to a point.
Height: Diminutive, Standard, Tall, Towering. Some mountain ranges are higher than others.

The extreme values of each feature are rarer, so a sparse population of thin, tall mountains, for example, is rarer.