Included is a demo rmf, bsp and wad, for best results use vhlt v33 to compile.

To use copy Lw-tunnels.ol to your "hammer editor/prefabs" folder and use provided wad.

Use the insert original prefab button and Flip and rotate to join, only use the vertex tool to resize or you may get errors.

Very easy to make complex tunnels systems, just slot them together

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these are the ones used on the new caen...they do work well