Following a suggestion and a discussion with @Damarmau (thank you mate!)...
New improved PBR shader for reflective materials (which is also made to be ignored by vamifier to keep the GI on highly reflective objects)
Disabled shadow casting on the shower doors to improve light propagation and make it more realistic
These modifications are especially made for people who wants to use vamifier with the enviro.
Updated the hierarchy of the asset
Updated the script with a checkbox enabling wall transparency. This option is not saved with the scene and only exists to ease the creation process.
Collision are kept, only the rendering is disabled. So you can disable walls even if your characters are using them as a support.