Off-axis perspective projection is a technique used in VR/XR applications to render a perspective that matches the viewpoint of a spectator relative to a display. This package computes and applies the off-axis perspective projection to a camera dynamically, providing a seamless view into a 3D scene. It can be used in conjunction with head tracking to create a dynamic view, similar to looking through a window.
This package is suitable for various use cases, including:
- Panorama multi-display setups
- Cubic VR CAVE display setups
- Building facade video projection setups
Please note that some post effects may be incompatible with multiple edge-aligned cameras. Additionally, the package does not include head/eye tracking functionality or four corner perspective correction functionality.
To resolve issues with multiple edge-aligned cameras, you can try the following workarounds:
- Disable Vignetting
- Reduce or disable Bloom and Ambient Occlusion
- Disable Exposure or set its Mode setting to Fixed
- Disable Visual Environment, HDRI Sky, and Fog
Also, note that Shadow distance fadeouts may not work as expected for off-axis projection.
This package uses Unity's physical camera properties (2018.4 LTS and up) and supports native rendering. It can be used with URP and HDRP cameras, but some features may be incompatible. The package does not include any four corner perspective correction functionality, which is needed for VR CAVE setups.
