I’m learning Tiled (1.8.5). I cannot understand which terrain set to use for an isometric tileset. This one has two full tiles and transitions between them. The flood-fill feature using works fine, but placement errors occur when I try to use the terrain brush. I’ve tried edge-only, corner only and mixed but I cannot find one that results in perfect tiles.
Hmm, it looks like a Corner-only set, but keep in mind that when you change your current Mixed set to a Corner set, it won’t automatically erase the marked edges, and currently they will still be taken into account (see issue #3260). So, until that is fixed, either create a new set or first erase the edge labels, before changing your Terrain Set type to Corner.
If you’re still having issues even with a clean Corner setup, please show us again what you did.