I had trouble drawing the chapel built by Père Lafitte and Susan without some kind of model so after many false starts, I made a very rough cardboard structure loosely based on the idea of a hollow tree trunk. Of course I didn't go as far as working out how many plastic bottles and other junk would be needed to build such a thing but I thought it would be fairly small, more or less human-sized.
Below is the cardboard idea and you can see how it developed in the illustration below which is now inserted at the end of installment 18 of La Vie en Rosé. There's another new image at the start of this episode as well. I hope to finish the rest of the missing illustrations pretty soon.