I recreatet the Scene and here is my Soloution.
on the Left side there are Static “Doors”
and on the right side there are Movable “Doors”
First Picture is the same as yours that the “Doors” are dark.
SecondPicture are the “Doors” brighter and fit better in the environment
and here are my settings for this:
I put a Sphere Reflection in it and
most Important
I Increase the Light Quality to High
decrease the “Volumetric Lightmap Detail Cell Size”
and the other settings as shown in the World settings Tab.
Then it Worked.