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Photogrammetry for Horror Environments

· 2 min read
Thang Le
Thang Le
Senior Lead Engineer

Photogrammetry

The Texture of Decay​

Horror lives in the details: the peeling wallpaper of an abandoned asylum, the rusted hinges of a cellar door, the moss-covered stone of a graveyard. Hand-authoring these "messy" textures can be incredibly time-consuming. This is why Photogrammetry—the process of creating 3D meshes and textures from photographs—has become a cornerstone of our environment pipeline at Wave0084.

Capturing the Real World​

The process begins with a high-resolution camera and a lot of patience. We look for real-world locations that exhibit the kind of "natural chaos" that is hard to simulate. Using tools like RealityCapture or Metashape, we process hundreds of photos into a high-poly mesh.

For horror, the "imperfections" are what we're after. The way a piece of wood has rotted or the specific pattern of a blood-like stain on concrete. Photogrammetry captures these nuances with a level of fidelity that "clean" procedural textures often lack.

The Game-Ready Pipeline​

A raw photogrammetry scan is millions of polygons—far too heavy for real-time rendering. Our pipeline involves:

  1. Retopology: Creating a clean, low-poly version of the scan.
  2. Baking: Transferring the high-poly detail onto the low-poly mesh via Normal and Displacement maps.
  3. Delighting: This is the most critical step. Photos contain baked-in lighting information. We use tools like Unity's ArtEngine or Adobe Sampler to remove this lighting, resulting in "PBR-ready" Albedo maps that react correctly to our game's dynamic lights.

Integrating with URP​

In Unity's Universal Render Pipeline, these high-fidelity assets shine when combined with Detail Maps and Decals. By layering a photogrammetric "base" with procedural "grime" decals, we can create environments that feel unique and grounded in reality.

Photogrammetry isn't about replacing artists; it's about giving them a more realistic starting point. It allows us to spend less time on the "grunt work" of modeling bricks and more time on the "art" of lighting and atmosphere.