Hey, smart one. That "ramp" is a stairway from the inside of the building to the top. The pic is taken from the opposite side of the door. And the ventilation is not for a chimney. The hot air coming out of the vent appears black for some reason. Which doesn't matter cuz I quit this mod and started a new one.
Themodderofmods
Sebastian joined
I am currently developing a mod of my own. I have just started modeling and I have been mapping for 4 years now. If you need tips about mapping or have a question, feel free to ask.