Projection Mapping in Caves

Texture mapping is particularly Important for projection in caves, because it visually calibrates the physical last step to the user (i.e., projector, lenses, cave shape).

In the development of openXR cave projection, I would recommend taking a look at Extensible 3D (X3D), Part 1: Architecture and base components, 42 Texture projector component.

https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/textureProjector.html

A related issue for multi-projector caves is blending the images of the projectors. In some cave methods, transparency-alpha values are included as part of the texture map.

Other parts of the X3D spec might be useful in constructing the openXR spec for caves.

Start by reviewing the linked X3D texture projector specification and the existing OpenXR cave-projection material. The issue proposes texture mapping, projector-image blending, and transparency-alpha behavior, but names no repository files or tests; done would require an agreed specification scope and corresponding documentation changes.

Written by the indexing model from the issue text.