This mod adds arc-nodes to Minetest as well as arcs for inner and outer corners. Provided nodes: default:cobble default:mossycobble default:stone default:stonebrick default:stone_block default:desert_cobble default:desert_stone default:desert_stonebrick default:desert_stone_block default:sandstone default:sandstonebrick default:sandstone_block default:brick default:obsidian default:obsidianbrick default:obsidian_block default:wood default:junglewood default:pine_wood default:acacia_wood default:aspen_wood To make arcs from nodes of your mod, put "pkarcs?" into your depends.txt, and call this function in your init.lua: if minetest.get_modpath("pkarcs") then pkarcs.register_node("your_mod:your_nodename") end Tested with Minetest 0.4.15 --- PEAK 01-20-2017