https://www.povray.org/resources/links/3D_Programs/Height_Field_Modelling_Programs_and_Utilities/
POV-Ray: Resources: Links: 3D Programs: Height Field Modelling Programs and Utilities
pov rayresources links3d programsheight field
https://www.artofmanliness.com/skills/outdoor-survival/estimate-heights-widths-objects-field/
Field-Expedient Tricks for Estimating the Height and Width of Objects | The Art of Manliness
Sep 26, 2021 - A few field-expedient tricks that scouts have used for centuries to estimate the height and width of objects using nothing but sticks and a bit of geometry.