Sphere
A sphere of any positive radius. Dome mode will allow only a given hemisphere to be displayed.
Parabola
A parabola with a given half-width and height, facing a given direction and rotated by a given angle.
Torus
A torus with any positive outer radius (the radius of the ring its based on) and any positive smaller or equal inner radius (the radius of the tube around the ring) around any of the three axes.
Ellipsoid
An ellipsoid of any three positive semi-axes. Dome mode will allow only a given hemisphere to be displayed.
Paraboloid
A paraboloid towards any of the three axes with two given half-width and a given height.
Grid
A grid of blocks with a given step size and number of steps in each of the three axes.
Catenary
A catenary (aka a chain or rope line) between two points with a arc length (rope length) of the distance between these points plus a given additional distance.