As far as non cube blocks...I was thinking of more natural landscape formations. For example...a single rock column, taking up only one block, would just have a mesh sort of like a stalagmite. It seems like it would work the same, I would just have to have some soft of post-process on the terrain to intelligently say "Here is a rock corner...just put a corner here" or "here is a rock column, use the stalagmite mesh" instead of just using blocks. Not sure if that makes sense of not. It would definitely take more resources, but it should be interesting to try it out. It might be a neat way to have a more "natural" landscape, but still give the ability to be generated, mined, and expanded on.

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