Simple implementation for "People Occlusion" features of ARKit3 by using custom material of ARCameraBackground.
It supports LegacyRP/LWRP/URP.
Although ARHumanBodyManager added to ARFoundation v3.0.0 provides human segmented depth and stencil textures, we need to implement our own shaders that realize People Occlusion features. This repository is simple implementation of them. The shaders reference depth and stencil textures and write calculated depth value to depth buffer. The shader is used as custom material of AR Camera Background component.
An official blog article about ARKit3 is here.
According to this artcle, the requiments of people occlusion features are below.
Please note that the people occlusion features are available only on iOS devices with the A12 Bionic chip and ANE.
Tested environments are below.
- Unity2019.2.10f1
- AR Foundation 3.0.0-preview.4
- AR SubSystem 3.0.0-preview.4
- ARKit XR Plugin 3.0.0-preview.4
- Xcode 11.0
- iPhone 11 Pro / iOS 13.1.3
Add ARHumanBodyManager component to "AR Session Origin" GameObject and set HumanSegmentationStencilMode and HumanSegmentationDepthMode to something other than Disabled.
Enable UseCustomMaterial of ARCameraBackground component and set PeopleOcclusionBackground material.
Add ARCameraOcclusion component to "AR Camera" GameObject and attach "AR Session Origin".
Download Unity package from release page and import to your project.
There are 3 shaders that support each Render Pipeline(Legacy/LightWeight/Universal).
Set proper shader to PeopleOcclusionBackground material.(Legacy one is default)
- ARKitPeopleOcclusionBackground is for Legacy.
- ARKitLWRPPeopleOcclusionBackground is for LightWeight.
- ARKitURPPeopleOcclusionBackground is for Universal.
They are based on default background shader located on Packages/ARKit XR Plugin/Assets/Shaders.
NOTE
LWRP one is tested on lwrp branch. Universal one is not enough tested.
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