3D Survey Collection: Level of Detail in Blender

Recommended prerequisite — The Golden Twelve

Before you author proxies, build LOD geometry, or work with semantic shapes in Blender, make sure you have the foundational shortcut grammar fluent. The Golden Twelve is a two-page reference card covering the twelve keyboard-shortcut command families that appear in every EM modelling workflow — navigation, selection, add & position, transform, edit mode, extrude, loop cut, knife, duplicate, parameters panel, modifiers, render. The shortcuts have been stable since Blender 1.0 (1995), so the skill survives every future Blender release.

Cite as: Demetrescu, E. (2026). The Golden Twelve: Reference Card for 3D Cultural Heritage Modelling (v1.0). Zenodo. doi:10.5281/zenodo.21068528 (CC-BY-SA 4.0). A companion paper is in submission to Digital Applications in Archaeology and Cultural Heritage.

Todo

Embed YouTube video — placeholder slug 03_3dsc_lod_concept. Once the recording is uploaded, replace this todo with a .. raw:: html iframe pointing at the real YouTube video ID. Working title: 3D Survey Collection: Level of Detail in Blender (~~6 min).

Clip: 03 | Duration: ~6 min | Recording segment: 11:43 → ~18:00

Prerequisites

Blender 3.x or later installed.

Overview

The 3D Survey Collection (3DSC) add-on solves the problem of working with very large photogrammetric models in Blender. The LOD (Level of Detail) generator creates four resolution versions of any mesh, allowing real-time switching between detail levels while working on site-scale datasets.

Fig. 2 The 3D Survey Collection panel in the Blender N-panel sidebar.

Key Concepts

Large photogrammetric models (10M+ polygons) are impractical on standard hardware.
The LOD generator creates four resolution levels from a single source mesh.
LOD levels can be switched at runtime — no scene reload required.
The 3DSC panel lives in the Blender sidebar (press N to open).

Screenshots

Fig. 3 Single architectural element at LOD Level 3: 10,000 polygons.

Fig. 4 Same element at original resolution: 10 million polygons.

Fig. 5 The LOD generator interface with resolution parameters.

Fig. 6 Switching between LOD levels in real time in the Blender viewport.

Try It Yourself

Apply the LOD generator to the sample mesh in the playground dataset and verify all four LOD levels load correctly.

Note

A video walkthrough for this tutorial will be available on the Extended Matrix YouTube channel.