Cardboard / carton might do the trick aswell...
Wipe a little PVA with a sturdy bristled brush over the 'glossy' side of the carton and let it harden out. The result is like woodgrains...
This is how I explained the trick in an article here on the site:
The shape of the door was cut out of the wall and a small piece of smooth (or glossy) cardboard was placed behind the hole. I drew the shape of the door on the cardboard to get an idea of how it would look.
To make the cardboard look like wood, I added a small amount of PVA over the complete width of the piece of card (on the smooth side).
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With a brush with sturdy bristles, I wiped the PVA over the door to create the wooden look, to create the grain in the wood. Once dry it resembles the texture of wood.
Green stuff was used to sculpt bricks over the frame of the door.
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Painting it went like this:
First of all the door and frame were treated with PVA to get the wooden effect.
The first picture shows the result of the dried paint over the PVA layer. It gives a kinda crackled look, which gives an extra nice detail to make our wooden doors look really old and weathered.
For this door I mixed up Goblin Green with Shadow Grey for the basecoat.
A wash of watered down Scorched Brown with Chaos Black was applied over the door and filled the cracks with a dark brown colour. Once this was dry I drybrushed several tones of browns (mainly Graveyard Earth, Bestial Brown, Scorched Brown, ...) over the door until I came to this look.
The fram around the door was painted exactly like the other wooden frames I did before. A PVA-coat for the wood-trick, a basecoat of Graveyard Earth, a wash of Brown Ink and finished with watered down Chaos Black + Scorched Brown (this final wash also usually removes the glossy shine of the inks).
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link to article of making a hobbit Brewery
And here's another article of Sam and Rosie's cava I did some time ago, using balsa wood...
link to Sam & Rosie's hobbit-hole