When tanks loads clientside, if the tank next to it isnt loaded (i.e. in a different chunk), it'll not register that a neighbour is there and wont connect the 'texture'.

Haven't even bothered checking boundaries.

Maybe when a tile loads, (on initialize()), if it knows it's at the edge of the boundary, it should tell neighbours to re-check textures. (findNeighbours())

Sounds good to me! It should probably be doing that anyway, instead of the blockPlace or whatever callback it's currently using. Who knows what other mods are going to do with tanks