Thought Experiment

Imagine being inside a sphere (or torus) that is perfectly reflecting - just you and a light source. What would it look like? 

In the Sphereverse, the universe is a sphere 40 units in diameter. When there is a floor present, the floor is 2 units down from center.

In this animation you are sitting back 10 units from the center of the sphere. The light source is translating from left to right centered on the x axis. You are not moving, only the light. All the concentric rings are caused by your multiple reflections in the sphere.

First some comments about the 'observer'. I'm not a good artist, so I didn't try to make a virtual person to be reflected. Instead I went with the simple and just used a simple marble sphere and placed the camera on it, right on its nose, so-to-speak. Here is a picture of 'you' so you know what is being reflected. The camera is placed right in the center where you see the white spot reflection of the light source. Trust me, you probably won't recognize yourself by your reflection most of the time anyway.

Makes one think, right? :)