I modelled the lookout of the Lord with simple cylinders, I used several modifiers to make them more random and natural like wood structures: Lattice, noise and twist, also in edit mesh some extrudes and move vertex with smooth selection, after what I instanced them to create the whole structure, Its easier to do a mapping one time for all of them instead of redo this with each one… After, I collapsed them and edited them to have different shapes.

For the ropes, I started with torus and Editable splines with Renderable option. I displayed the mesh of the spline and started after to collapse them and edit them. It was a very simple way to do complex ropes shapes.

This I the way how I did the texture of the wood structures, I used polished wood and two bark. I did a multi material with tree different textures, the first one I tiled with the bark only, the second for the transition between the bark and the white wood, and the polished wood I tiled for the end of the pillar. You must subdivide your geometry where you want to assign different IDs of material on your object (in edit mesh mode)

It start to be interesting, I added a subtle bump on the bark, at strong backlight to fake the sunrise and a few blue omni directional lights to fake the undirect light coming from the sky, no radiosity on this picture.