September 22, 2017

Casting 40k Terrain: Initial Tests

With the New 40k coming out and the imminent release of Necromunda, I've found myself needing some terrain. I bought a Ferratonic Incinerator but I quickly realised that this wasn't going to go far in covering a 4x4 table, never mind a 6x4. I can't really justify spending the amount of money I'd need to buy all the sets. So instead I had planned on making my own terrain. I bought a few builts to scratch build panels I could cast but to be honest they just weren't coming out as well as I'd hoped. After wondering what to do I thought that maybe I'd try casting some of the pieces from the sets I had. In the picture you can see where I made a few holes in the casts. This was as a result of not having mixed the Stewalin plaster at the right ratio and probably demoulding it too quickly.

I bought some silicone and Stewalin plaster. I have used the plaster and the silicone before while maing some scatter terrain for the Old West. You can expect a post on that at a later point. To make the mould I just followed one of the plethora of videos online. It was really simple and worked a charm, though next time I might break them into single pieces as that way I can judge what I need to cast them better and also I don't have a huge amount of working time with the Stewalin and it taes a lot of time to work it into a mould this highly detailed. Anyway I have to approach this project as a learning process. I haven't moulded or cast anything like this before.

This is a picture of the mould. As you can hopefully make out its pretty detailed. It is 100% bubble free which is impressive. The crevices are deep and tight yet the silicone was able to flow into them. I used an electric toothbrush as a vibration device which wasn't very effective. It seems I didn't need it or it was far more effective than I thought it was. The plan for this project is to make a few low structures with walkways connecting them. I'm going to keep them fairly modular for storage purposes. I'm going to concentrate on getting a  single structure done and then I'll know better how to get these mass produced quickly. Just as a note to the curious: I won't be selling, trading or otherwise giving away the moulds or the casts I make from them, please don't ask. The purpose of this blog post is to show whats possible and to track my progress.


  1. Wow nice:)) i am going to make something like this.i am big fan od necromunda.

  2. Do you have any pics of how you moulded the walkway supports?


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