I did some searching but I might just be missing a phrase or something when trying to find the answer
If my sketch needs 800L of linseed oil... Do I need to make a cistern in order to use it? Or will the game know if I have 8 barrels full of linseed nearby? How do people make sketches that require more than 1000L?
edit: Is it actually 80L? I only have 20L so I can't test it, but the icon is misleading. I just want to be SURE.