/vr/ - Retro Games

>>2866371
if on the other hand you meant e3m9, reached from e3m6:

1. you need to have pressed this switch on the outer side of the yellow key building (it requires a careful step off the ledge out)

2. then the secret exit opens inside the yellow locked building. it is the diamond-shaped pillar.

that said i am now confused though because neither of these maps match your picture.