Realistic & Fake First Person BP Scene Comparison with & without VR!

Hi, I’ve done 2 same scenes that having the Same Project & World Settings on First Person BP GameMode. The right one started from a workable VR scene that I’ve done previously which tested worked perfectly on Vridge/Riftcat. I’ve removed the previous static meshes & migrated the whole scene from the left into the right with all the same lighting & Post Processing. Basically both scene are totally the same scene. For the left scene i can simply build lighting to get realistic shadow & reflection, where the right scene I can’t make it at all. It looks very fake without proper shadow, AO & reflection and there will be no “Lighting need to be rebuild” warning too! But When I force it to build lighting, it will goes very fast and nothing have change after built lighting. Please help why this can be happened?