UI Toolkit World Space?

I'm loving the UI Builder and USS system!

I'm hoping that it's possible to render a UI in world space. There seems to be a 'target texture'
RenderTexture for that exact purpose but whenever I attach a render texture to my Panel Renderer I get the following error:

NullReferenceException
UnityEditor.SceneView.OnGUI () (at <cf7d2c2e83f749e8943578126f9eff4b>:0)
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <437ba245d8404784b9fbab9b439ac908>:0)

etc...

Does anyone know of a workaround?

 

Do you have any update on this? This is exactly the problem I am dealing with.

 

Depending on your implementation needs (supposing you don't need world lighting/shading) you can just have an overlay UI and modify the coordinates of your overlay.

For example, if you need a health bar displayed above a character, you would translate the 3d coordinates of the transform into 2d space to get the screen position as seen by the camera, and get the appearance of world space

 

I did also find this gist in case you need something more complex, it appears to create a world space interactive ui using UI Toolkit, but I haven't tested it myself:

https://gist.github.com/katas94/7b220a591215efc36110860a0b1125eb