It's just what you've been waiting for - MORE ANNOYING FEEDBACK! This time I also have a question...
QUESTION: How do you add vertices to an Editable Poly? I see you do this a lot and it would be a nice addition to my toolset if I knew how to do this.
Feedback-wise I have included another storyboard which I have attached to this post. Basically imagine the ugly green cube in the first picture is your castle wall. Instead of using Boolean Subtract, (the very phrase makes me shudder in horror) you can simply design a spline. I roughed out one with a bit of an arch to it. Then you just add an Extrude Modifier to extrude it. You can always go back to the Line Subobject and add more vertices for detail wherever you like. Once you're done just collapse and convert to Editable Poly. Takes just as long as the OTHER method, but is as you can see it's FAR superior!
The only other thing is you can also use Quick Slice on selected polys on your mesh, in the Polygon Subobject mode. I've never had any issues with this, and that kind of thing would work fine for cutting out a chunk of the castle wall. I WOULD NOT attempt to use it for cutting out the gateway, but for SLICING a part of an object off it is usually an excellent choice.
You guessed it - more to come later!

Deathbliss