Klüver Form Constants (the geometric spine)

✦Description

The four universal geometric templates that recur across nearly all reported psychedelic and hallucinatory vision, and which underlie the more baroque DMT structures: (1) tunnels and funnels (also alleys, cones, vessels); (2) spirals; (3) cobwebs; and (4) lattices (honeycombs, checkerboards, triangles, gratings, filigree). Reported as saturated, brightly colored, symmetrical, endlessly replicating fields that tile the visual field. On DMT these primitive forms appear almost instantly at onset, then compound and sophisticate into chrysanthemums, jeweled tilings and hyperdimensional scenes — but the underlying grammar of tunnel/spiral/cobweb/lattice remains legible beneath the ornamentation. Because the same four forms show up in migraine aura, hypnagogia, sensory deprivation, fever, near-death states and pressure-phosphenes, they are treated as the scientific 'skeleton' of visionary geometry rather than anything DMT-specific.

✦What the sources say

The four form constants: 'grating, lattice, fretwork, filigree, honeycomb or chessboard'; 'cobweb'; 'tunnel, funnel, alley, cone or vessel'; and 'spiral,' seen in 'bright, highly saturated colors.'

'Geometric visual hallucinations, Euclidean symmetry and the functional architecture of striate cortex' — form constants arise from spontaneous symmetry-breaking pattern formation in V1, mapped to the visual field by the log-polar retinocortical transform.

Subjective Effect Index catalogs 'partially defined' and 'fully defined geometry' as structured lattice/tessellation fields that precede full 3D and immersive geometry.