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Heritage Photogrammetry & 3D Documentation · EWAP

Black Village
Gatlang, Block B

Gatlang, Nepal

Project overview

A stone-and-timber village block

For the Endangered Wooden Architecture Programme, Block B in Black Village Gatlang was reconstructed from aerial and exterior photographs. Its stone-and-timber buildings have wooden-shingle and corrugated-metal roofs. I aligned the image sets in RealityCapture and merged them into one component. The project holds nine model versions, a textured model and an orthophoto projection.

1,705
Images: 429 aerial and 1,276 terrestrial
9
Model versions
80 s
Flythrough of the Block B model
View the Gatlang model on Sketchfab ↗See the workflow

The June 2025 model

Path-traced renders

The June 2025 export has 1,000,096 faces and three 8,192-pixel texture tiles, processed in RealityCapture 1.5.1. I made these path-traced renders in Blender with the model’s own textures and a single sun.

Render of the textured Gatlang model from above at an angle: stone houses with wooden-shingle and corrugated-metal roofs, blue tarpaulins and terraced ground.
Aerial view. Stone houses under shingle and sheet-metal roofs.
Render of the Gatlang model from the opposite side, with a long shingle roof, blue tarpaulins and a green water tank.
Opposite side.
Render of the Gatlang model from the rear, with a stone house, metal roofs and a terraced yard.
Rear side.
Near top-down render of the Gatlang model: a long shingle roof running through the middle of the cluster, with yards and a channel to the right.
Plan view. The long central roof and the yards around it.
Close render of shingle and corrugated-metal roofs on the Gatlang model, with prayer flags and a blue roof beyond.
Roof detail. Wooden shingles, rusted sheet metal and prayer flags.

The model

Black Village Gatlang, Block B

A flythrough of the Block B exterior model, exported from RealityCapture and dated April 2023. The block is stone and timber, with wooden-shingle and corrugated-metal roofs. The project holds 1,705 images, 429 aerial and 1,276 terrestrial, and nine model versions.

Block B flythrough. 80 seconds, from street level to an aerial view of the block.
View of the Gatlang model along a row of timber houses with wooden-shingle roofs, a corrugated-metal gable and stone footings.
House fronts. Timber walls on stone footings under shingle roofs.
View of a timber house corner in the Gatlang model with a corrugated-metal wall, a green water tank and a leaning tree trunk.
Street corner.
Aerial view of the Gatlang model showing shingle and metal roofs of stone houses, blue tarpaulins and a path between the buildings.
Roofs from above. Shingle, metal sheet and tarpaulin.
Aerial three-quarter view of the Block B model: a cluster of stone houses with shingle roofs, blue tarpaulins and terraced ground.
The block. An aerial view over the whole cluster.

Published models

Interactive 3D reconstruction

Explore Gatlang in 3D

Gatlang Nepal — a published interactive model from June 2025. This is a separate published model from the April 2023 Block B flythrough shown above.

Gatlang Nepal · Ujjwal Man Maskey · Open on Sketchfab ↗

Two Gatlang models, two years

A first Gatlang model went online in April 2023, built from 2,396 images at about 300,000 faces (Sketchfab ↗). The June 2025 model has about one million faces (Sketchfab ↗).

Block B publication: The Gatlang model went online in April 2023, built from 2,396 images at about 300,000 faces (Sketchfab ↗).

Design & technical approach

Aerial and exterior, merged

I aligned the aerial and exterior sets as separate components in RealityCapture, merged them, then built the model versions from the result.

Aerial_MPEX_NEWMerged1,705 images · 9 model versions
Gatlang, Block B. Aerial and exterior merged into one.

Final deliverables

What came out of the processing

Textured model
Nine model versions of Block B, one textured
Orthophoto
Orthophoto projection of Gatlang Block B
Flythrough
80-second Block B exterior flythrough, exported from RealityCapture, April 2023
Published models
On Sketchfab, April 2023: Gatlang ↗
RealityCapturePhotogrammetry3D reconstructionPoint cloudsMesh reconstructionTexture baking

I completed CyArk’s virtual EWAP 2025 Photogrammetry Workshop in January 2025. Field data: EWAP field teams. My role: processing and 3D model output.