Creator reconstructs 500+ captures as in-place 3D holograms

• Sidhu has turned a 2D wildlife moment into a geospatial 3D replay, with the deer revisited as a hologram at its real-world location, according to bilawalsidhu's demonstration.
• The venue-scale version combines more than 500 captures into one spatial memory palace, per bilawalsidhu's follow-up.
• The idea draws on photo-collection reconstruction research, a lineage bilawalsidhu's deep-dive link explicitly points viewers toward.
• The posts do not identify the capture hardware, reconstruction stack, or viewing device. Neither bilawalsidhu's demonstration nor bilawalsidhu's follow-up names them.

Bilawal Sidhu's long-form primer traces this line of work back to Photo Tourism research, which built navigable models of famous places from hundreds of overlapping photos. His current experiment swaps the landmark tour for a camera roll that stays attached to the world.

Sidhu calls the proposed archive a “geospatial memory palace,” where a recorded moment remains at the location in which it happened.

The concept gives a memory two retrieval keys: the time it was recorded and the physical spot it belongs to.

Sidhu says the venue version contains more than 500 captures. Neither of his posts identifies the visual representation or how those captures were aligned, so the demonstration establishes the scale of the collection, not a reproducible capture recipe.

The original Photo Tourism paper describes two ingredients behind its landmark reconstructions:

• Structure from motion: overlapping photographs are used to estimate a 3D scene and camera viewpoints.
• Image-based rendering: those estimates support viewing the reconstructed place from new perspectives.

Sidhu's published posts do not name the representation used in this new project. The “hologram” label describes the experience, not a disclosed implementation.

In a related reply, Sidhu pointed to Intangible as a similar creator use case, combining kitbashed splats with other CG elements. Intangible's announcement frames its new splat support as a way to turn the real world into a scene creators can direct; Sidhu did not claim that it powers the memory-palace demo.