Hello. I am quite new to Therion, and I am currently drawing a map over a cave we are exploring now. Therion mostly works great. I have some problems, but most of them I manage to solve by using the documentation and the good old "trying and failing strategy." However I have a problem with areas that I have not managed to solve. The "filling" often seem to not stay inside the given borders. I have tried doing it a number of ways, but all seems to fail. I then returned to the example data, and one of the examples, the small example cave 1 has a nice little lake quite similar to the one I am trying to create. The data is here: http://therion.speleo.sk/downloads/demo.tar.gz But this also compiles in a way placing the lake outside of its borders. I have enclosed a PDF of the compiled example. Does any of you know what is wrong? I use Therion 5.3.8 on a Ubuntu 11.10 desktop. (Therion from repositories, I have not compiled myself.) Best Regards Bjørn Egil Johansen Tromsø, Northern Norway.