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I improved the jbeam greatly so that we can actually build things with it. Pile them up and use the usual "attach nodes" feature to attach them...
The jbeam from the original BeamNG Concrete Retaining Wall does not fit perfectly the dimensions of the blocks. I fixed that in this update.
This is one concrete wall block. I extracted the block from the original BeamNG Concrete Retaining Wall. I needed to be able to spawn only one...