Godot Version
v4.3.stable.mono.official [77dcf97d8]
Question
I think I have actually solved this issue by referencing this post, but I wanted to post a topic here to help anyone else who runs into it.
I am using HTC Vive Pro with Steam VR and noticed that hand models became invisible when Steam VR version advanced from 2.7.4 to 2.8.8.
My test user with Meta Quest 3 could not reproduce this problem.
The post linked above says that controller pose “default pose” is no longer a valid choice and recommends using “pose” instead. In my version of XR Tools (4.3.3) “pose” was not an available choice, but choosing “aim” instead of default solved the problem; my hands are now visible in Steam VR versions 2.7.4, 2.8.8.