is there any way to clip through the wall that takes you to the evacuation path you go through only after defeating mother brain? would be interesting to see what happens going reverse to her

first of all, the wall is composed of bombs block in the non escape state which lead to a grey door, secondly you need to use ST beam to be able to enter the door but you need to always use ST beam to enter all the door in reserve as all of them are grey since its suposed to be a 1 way door, i knew that andrew as done it i just don't have the video to show it, but it was done and i don't remember well but i think it trigger the escape flag when you return to the room with the gate, i might be wrong on that though

Wasn't that the old way for GT Spactime ?