Depth RenderTexture not working on WebGL with Unity <= 2019.4

Hi guys,

I have a very simple scene (no coding involved) using the builtin render pipeline with a Camera outputting to a depth RenderTexture (left), and this same RenderTexture displayed over a simple cube using an Unlit material (right).


It works fine in the editor and on standalone PC:


But the issue is when exporting to WebGL:
When using Unity 2019 or lower (I tried with the latest Unity 2019.4.15f1), the depth is all black:


If I open the exact same project with Unity 2020 or higher (I tried with Unity 2020.1.0f1) and export it to WebGL, it works fine:


You can find the attached project in the thread.

I couldn't find any mention of this kind of issue. Am I doing something wrong, or do you know if there is any workaround?
Thanks

 

Note that I also tried to force the depth texture mode of the camera capturing the RT, without success

Code (CSharp):

1. var cam = GetComponent<Camera>();
2. cam.depthTextureMode = DepthTextureMode.Depth;