The Tetrahedral Gnomonic projection, published by A. J. Potter in The Geographical Teacher, Vol. 13, No. 1 (SPRING, 1925), pp. 52-56.
Using d3.geoPolyhedral on the tetrahedron
Gnomonic projection on each face
This is the “continental Earth” aspect given by Furuti.
Research by Philippe Rivière for
d3-geo-projection issue 107.