"I thought greeble just meant bits, I don't think it meant "Auto"..."

You are quite correct, FranOnTheEdge, and I'm sorry if led anyone astray with my misinformation. There are programs (plugins) out there called "Greeble" and I assumed this is where the name came from.

A bit of web research leads me to believe that "greeble" and "nurnies" are the same thing, though some people use the terms to describe slight variations in the style of 'bits'.

I'm going to stick with the term "widgets", which is what Brit special effects people called detailing on space ship models before the days of computer graphics.

"But that's probably something to do with the slight shadow that wall is in..."

That and the view angle. It's the same wall as the one facing it. In fact it's the same wall as the back wall and the same as the floor. I never said I wasn't lazy!

Because of this repetition, I won't be releasing this 'model' as is. What I'll do is make up a load more similar blocks over the next week or so and add them to the twenty used here. People can build their own structures to suit.