Now that the cardboard for the back is securely attached, we can start building up the volume of the rock. Here, I'm using empty egg cartons. The points of the egg cartons are ideal to serve as the basis for the points of the rocks. |
Using the points of the egg cartons and some pieces of cardboard and tape, the volume of the rocks is shaped. It's not very important how exactly the shape turns out, as long as it's not too regular. A real rock is also irregular in shape. The rock doesn't need to be perfect, and not all holes need to be sealed shut. Another layer of paper will be added, and that will close the gaps. |
Build all supports into rocks in this way. After this, there's a messy job, and it's better to do it all at once. Here you can see only rocks that aren't placed in a corner of 2 perspex strips. |
However, there are also supports that come in a corner. In that case, you need to create cardboard on two sides. When you place the support with the cardboard against other supports, there is cardboard on both sides. You can see such a corner support mounted next to this. So, there are two smooth sides on a corner support. |
Additionally, there are a few shapes that sit between two parallel supports. These supports also have two smooth sides. It's very easy to remember: cardboard always goes against the glass. |
The next step is covering the shapes with small pieces of newspaper. I use quick-drying wood glue for this. It adheres well to both the cardboard and the PLA and dries smoothly. Spread the glue on the shape, stick pieces of newspaper on it, and smooth them out with a brush. Also, brush wood glue over the outside. Make sure all holes are closed and, if possible, create more texture. However, make sure the back doesn't get too thick, or else the screws won't fit anymore. |