3D virtual tour example: a 45 m² flat, produced four times

The same Paris flat, 29 viewpoints, produced four times from four different sources. It is the property where the gap shows best: with 360° panoramas alone, only 17 of the 29 viewpoints find their place.

Updated 2026-08-17

The four tours, open

These are the real tours, not screenshots. Click a thumbnail and the tour opens right in the page. No sign-up.

The property

A Paris flat of roughly 45 m², bright, under the roof, looking out over the neighbouring buildings. 29 viewpoints, which is a comfortable density for this volume: about one every two metres.

It is an ordinary flat, and that is exactly why it is interesting: nothing here was staged to flatter the process.

What each format gives, here

Hybrid — the link and the backup together

All 29 viewpoints placed, the geometry of the Visites-virtuelles survey and the original colour rendering. It is the reference of this page: everything the other three show is judged against it. Look at the dollhouse view — the partitions are crisp and the corners are square.

Visites-virtuelles backup — the geometry without the original rendering

Same 29 viewpoints, same measured geometry. The difference is in colour: the images are rebuilt from the raw survey captures rather than taken from the original player.

The two thumbnails above show the same view, and the gap is visible without looking for it: on this heavily backlit window, the rebuilt version is milkier and less contrasted. That is the known limit of the process — rebuilding can correct a colour cast, it cannot lift a veil. On less extreme scenes the gap narrows considerably.

That is exactly why hybrid mode exists: it takes the geometry from the backup and the colours from the player.

Visites-virtuelles link — original colours, estimated depth

All 29 viewpoints are placed, since their positions come from the original survey. What is missing are the distance measurements: depth is estimated by AI. While walking you barely notice; in the overview, distant volumes are approximate — the reveals and the view through the window come out softer.

360° only — the case that struggles

17 viewpoints out of 29. That is the figure to take away from this page, and it is not down to bad photos: it is this property that defeats photogrammetry.

With no position data, each shot has to be tied to the others by recognising the same details from one image to the next. But this flat is small, bright, with large plain wall surfaces and few distinctive objects: two different places look too alike to be told apart, and twelve viewpoints do not find their place.

Adding resolution changes nothing — the missing information is not in the pixels. What would have helped: tighter spacing, more furniture in frame, doors left open. The method is detailed in how to create a 360° virtual tour.

Prices computed with the live grid — detail on the virtual tour pricing page.

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