Quote Originally Posted by fallen851 View Post
It is based on a percent chance from the descr_engines text. There is a catergory "engine_ignition" which can be modified.

I've edited the values to make towers burn much eaiser since I removed the "machine gun" defensive towers. I left the value the same for the ram though, because it is covered in hide, and they still have to deal with the boiling oil if they go through the gate anyway.
Machinegun? picture several archers inside said tower, taking turns moving to the arrow slot and firing, then moving to allow his comrade to fire.