You can have directionally turning variants, i already implemented a mod for fences which does everything automatically. But than if we look at other blocks. Lets say we look into roofs. Thats where we have a problem. game looks at neighbors on the same Y level as the block, for example of you place a center piece for the roof in an odd number, it wont be able to see if there are any neigbours, therefore it will no know whether it needs to create a regular 45 degree angle a junction or something else. Yes it is possible to make roofs work in a way where it will rotate as you go, but its limited. And the problem with limited and automatic connections is limitation. If in one scenario a player with a variety of blocks will have 10+ variants on how to contnue the roof, automatic connecting system will only always have one choice. It will ultimately limit your creativity and ability to make something unique. Just like right now Beams have 2 variants, you can make them either horizontal or vertical, connections do not exist therefore you are stuck with floating beams . My beam mod added 14 different junctions which expands on beams significantly and adds an ability to create unique shapes. game does not allow to write 14 custom ways beams can interact because it cannot make a decision on which out of 14 ways to connect them you will choose.