You'll have to wait for more on these. But Turret is coming soon!
Meanwhile, I took 2 photos from Unsplash (here:
https://unsplash.com/) and created this.
Actual texture is 2048x512, this one is 1024x256. Tiles VERY smoothly. Don't have ingame pics still, but they should come soon, as I start to put my map together (still working on a complex tunnel system, once I'm done with it, a WIP thread will be opened).
DISCLAIMER: Please note Unsplash have a license which grants everybody permission to do whatever they want with the photos. Don't just take photos from Google--I'm all for the abandoning of most copyrights but that's not the way to do it.
EDIT: Now I notice the bottom (tiled) image has some artifacts. This is due to the reduction in size of the image; the actual texture does tile nicely.