Is there a way to quickly generate collisions for multiple tiles (based on pixels or something, or even just fully fill tiles with a collision box), or select multiple tiles from a tileset and apply a collision to all of them at once ?
Because editing them one by one or copying xml lines in the editor is very long if you have a large tileset.
For sure it would be nice to make this possible. In the meantime, you can speed things up by using Copy and “Paste in Place” (Ctrl+Shift+V) to copy the collision shape(s) from one tile to other tiles.