how to create realtime refection?

Hello every one. I would like to make a real time reflection as shown in the picture. well I know about the BOX REFLECTION CAPTURE ACTOR but the problem in that is if i zoom in towards window then it don’t look like real reflection bcoz of the distance of the objects in the environment shown in the reflection. so if anyone knows how to make real time reflective materials which updates while the camera is moving then pleasure write an answer. i shall be very thankful to you. i am doing and arch viz but i m stuck here at real time 100% reflection.
Thanks

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