Fenn's 3D Rails
My own take on 3D Minecart Rails, with a more vanilla feel.
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Fenn's 3D Rails
Fenn's 3D Rails!

I personally wasn't satisfied with the 3D rail packs ive found as I feel they don't fit into the base game very well. So this is my attempt at a more simple and vanilla feeling 3D rail pack! (No voxels or polygonal curves)