Holagraph Slab v2.0: Wide-Footprint, Max-Stable Volumetric Light Bowl With Full 3D TIM Solidification and STL Export

Holagraph v2.0: A Slab‑Based Gaussian Field Engine for Stable Volumetric Light Geometry

Holagraph v2.0 is a disciplined, build‑ready field engine that studies how overlapping steerable Gaussian beams carve stable volumetric structures inside a thin 3 mm interaction slab. Unlike phase‑coherent holography or room‑scale volumetric displays, the v2.0 framework operates entirely in the incoherent regime, summing intensities rather than phases. This keeps the simulation faithful to the realities of accessible hardware—520 nm diodes, SG90 servos, ESP32 control logic, and TIM‑backed aluminum spreader plates.

The engine evaluates the field slice‑by‑slice along the depth axis, producing full z-stacks of intensity maps, curvature profiles, and threshold‑based hardened voxel regions. These hardened regions (Bands A/B/C) serve as optical analogues of material boundaries, revealing where the field becomes dense enough to behave like structure. A TIM‑inspired persistence model ensures that only stable, repeatable regions survive to STL export.

The mathematical framework includes Gaussian beam propagation, Rayleigh‑range‑limited waist evolution, incoherent superposition, and a persistence‑based hardening threshold. The results demonstrate stable bowls, slabs, and solid‑core regions across all runs, confirming that structured volumetric geometry can emerge from deterministic overlap rather than phase control.

Holagraph v2.0 therefore provides a reproducible, open‑hardware‑aligned foundation for future emitter lattices, multi‑layer slabs, and room‑scale Foundry architectures. It is a shop‑manual approach to the geometry of light—simple, stable, and buildable.