RayTracedSphere Problem

Hi, I have a problem with RayTracedSphere node in material and I put it on post-process material. I use like this pic.

However, the result is wrong. There are 2 circle in my scene like video. [Result Video][2]. The result that I expect is 1 circle in scene. Thank you.

It’s possible that one is the start and the other is the end of the trace. I’m not familiar with this technique.

I think so but I wonder why the circle separate. It should be 1 circle. Do I use this node in the wrong way.

You were really close to what you want. To exclude the undesirred sphere use intersection end depth, you can setup your material like this. Hope this helps someone!