The first gif is if the player is inside the building, then player sees the inside reflected in the mirror, but my intention is to show the inside of the building from the outside, so I can use the SetOwnerNoSee the outside building mesh until he enters inside, the SceneCaptureComponent2D points to the inside of the building, and the PortalMesh with the assigned material points to the outside of the building.
that is why i only need a SceneCaptureComponent2D.
This is the problem I have, as you see the rotation and the scale are not right.
https://gyazo.com/f9fcd29b47ab58f60b9555f4d30f747c
https://gyazo.com/4a905413f0d85d3981ff326cec81dc4e
Here you can see the Blueprint and its components, the SceneCaptureComponent2D points inside and the MeshPortal shows the content in the opposite direction. As if it were a Window.
https://gyazo.com/821d3be2ecb3166edc25c39f72a2d53d
Well, I have solved it by anchoring a ChildActor and using the same logic as in the BP_Portal.
But the idea was to use a single BP_Portal and one or 2 SceneCaptureComponent2D.