Seems like my river is a lot of trial and error.
I tried to pour it directly on the table without a mould.
First I wanted to draw a line with hot glue to build a barrier. That did not work because the hot glue warped the baking paper while cooling down.
I decided to pour it without any barrier. It showed that any of the surfaces at home are level enough, even if my bubble level told me.
At first I wanted to cut and file the pieces in shape because the resin is at least for 2 days soft enough to cut it with a box cutter. I noticed that there were places where the resin withdrawed while hardening. I tried to pour a new layer of fresh resin in the spots. Unfortunately it is clearly visible, where I poured the new layer. You can see it clearly on this picture, too.
That somehow did not look pleasing to me.
There where some sheets of xps by the army painter (terrain maker) laying around in my hobby cave. So I took them and started a new river. The process became much more complex than I wanted it to be. My hot wire had much more to do than it expected to...
The pieces are cut out of a single piece and separated. After this the middle part was cut several times with very thin layers to make it lower than the edges. Then all was glued together again.
I crafted a lot of pieces.
The edges were textured with a ball of aluminum foil. I did not want to use pva and sand because it would warp the pieces.
The recent state:
Next:
wash, drybrush, epoxy resin (right now I have no idea how to seal the pieces, time will show...)
Stay tuned...