In this photo you can see the large dome with the foyer behind it. Two forms sit in the large dome. Also, in the foreground you can barely see an orange line. This orange line is where the outer octagonish wall will go.

I should mention that it is better to leave the forms in place until the structure is built. In my own work I attempted to save money by using as few forms as possible. Based on these experiences I have found it is possible to do this utilizing some techniques I have developed to assist the buttressing of the structure. One of these techniques involves driving conduit in the area you are trying to strengthen. Once the conduit is in place rebar is driven into the conduit. Rebar by itself in unstablized earth doesn't do much good. By increasing the diameter of the reinforcement and combined with fibers of the bag, it seems to have a strengthening affect. This observation was made by jumping and pounding on an area before and after use of the reinforcement.