I've been planning to make a spooky cemetery scene for some time now. The largest features of the scene will be a gravedigger's shack and a large, forked, dead tree. I have been looking into various tree construction methods and got very excited about the twisted wire method so I figured I'd make a test tree.
The idea here is to cut a number of lengths of soft metal wire, bundle them together and twist them to begin forming a tree trunk. At interval, you pull a few wires from the bundle and twist them together to form a branch, which you subdivide to make thinner branches. This process is repeated all the way up the tree.
The resulting tree armature can have a convincing shape but needs to be coated with some kind of compound so that you can fatten up the trunk and add bark texture.
Here's my first attempt- I gathered seven lengths of aluminum wire, each 20 inches long. I stacked the wires together and folded them in half. The loop will become the base of the tree and the 'loose' end of the bundle will ultimately be the top of the tree.
Twist, twist, twist, twist...
The wire bundle twisted into a basic tree shape
The process was easy and actually quite fun to do. The aluminum wire that I used is soft enough to bend easily but when twisted together makes a plenty sturdy tree armature.
I feel like I made a couple of mistakes already. I should have made the first couple of boughs (the ones closest to the bottom) a bit longer so that the tree had more of a taper to its shape.
I'm not sure about the scale of the tree. It looks a bit large for wargaming scale (25-28mm figures).
The tree is also very sparse. It only has a few boughs, and those boughs only divide once or twice. This doesn't make for a very forky, spooky tree. I think these problems are easily solved on the next tree I build:
To fix the scale problem, I will make the internodes (the vertical spaces between branches) shorter.
To fix the problem of sparse branching, I'll start with more wires in the bundle and take between four and six individual strands off of the trunk to form branches which will let me divide each branch one or two more times and get things spread out a bit better.
Coating the tree. I had some real problems here.
The twisted aluminum wire is VERY slippery. I tried to coat the tree in a thin layer of Sculptamold, but the Sculptamold refused to stick to the metal (no surprise) but also was not cohesive enough to hold itself together. I tried smashing Sculptamold around the trunk and branches but it was too weak to hold its own weight.
I tried spraying the tree with primer in order to give the surface a better tooth. Priming the tree had no effect on the Sculptamold's performance. Sculptamold just doesn't work here, its anti-gravity properties are poor.
I ended up cutting long, very thin strips of plaster cloth and wrapping the tree and branches. This was decently easy to do and the result is pretty good. at the very least, I now have a sturdy, porous surface on the tree that will help other materials stick.
NOTE: I've read of a product called "Flexibark" which is popular for this job. Apparently it's plenty sticky enough to hold itself to the tree and includes some texturing materials which supposedly emulate bark. Also, the dried product remains flexible in case you need to make changes to the shape.
NOTE: I've also read that spackling compound can be used to coat a tree armature. Especially if you can mix it from powder and control the consistency of the mixture.
I didn't have access to either of these items so I just went with the plaster cloth for this tree.
Oh, and obviously modeling clay is an option but I didn't want to use clay because I don't want to hand-sculpt all of the texture... I want to try to inherit some texture from the material that I use for this test tree. I secretly feel that polymer clay is probably the best option for building up the tree so I'll try that in the future.
The tree armature wrapped in plaster cloth and allowed to dry
The result of using the plaster cloth is interesting. The tree has a decently rough texture that I think might pass for a barky surface with the right paint job. There are a couple of spots which definitely look wrapped (near the base) but there are also places which look naturally nobbly and tree-like (the branch second from the top).
Overall the tree is a bit lumpy and inconsistent looking. This might be OK for a dead tree. The branches are too thick when compared to the trunk, and the branches do not taper. This particular appearance makes the branches look broken, which again might be alright for a dead tree.
I think the tree needs some more shape work before painting. The trunk needs bulked up and the branches do need a bit of a taper. I'm not sure what I'm going to use to build up the needed bulk. The chunks of paper in Sculptamold are too large and would give the tree a strange texture, and lightweight Hydrocal is way too fragile for the job.
I guess that leaves good old plaster-of-paris. Or maybe I can find some spackling compound.
Next up, improving the shape and texture. Also, painting.