Video tracking: reflections in real time without a CGI actor/object (green chroma) ¿it is possible?

Hi! im again.

I really have a big question about the green chroma and the posibilities on the reflections and other effects in real time.

IF i record a actor (real person) or any object from the front side with a green chroma back/side to her and a render scenarie with reflective walls and floor…¿its possible to reflecting the actor/object with the record in real time?..if its posibble…¿how the render knows how looks the actor/object from the back side?..if its not possible ¿I need render by CGI my actor/object and in this case…his need also a video tracking?

Captura de Pantalla 2020-09-29 a la(s) 1.31.15