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minetest.register_on_generated(function(minp, maxp)
if maxp.y < 1000 or minp.y > 5000 then return end
local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
local data = vm:get_data()
local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
local void_id = minetest.get_content_id("mcl_core:void")
local barrier_id = minetest.get_content_id("mcl_core:barrier")
for x = minp.x, maxp.x do
for z = minp.z, maxp.z do
local barrier = (math.mod(x, 62) == 0 or math.mod(z, 62) == 0)
local void = (maxp.y < 1500)
if barrier or void then
for y = minp.y, maxp.y do
local p_pos = area:index(x, y, z)
data[p_pos] = barrier and barrier_id or void_id
end
end
end
end
if maxp.y > 5000 or minp.y < 1000 then
for x = minp.x, maxp.x do
for z = minp.z, maxp.z do
local y = (maxp.y > 5000) and 1000 or 5000
local p_pos = area:index(x, y, z)
data[p_pos] = barrier_id
end
end
end
vm:set_data(data)
vm:calc_lighting()
vm:update_liquids()
vm:write_to_map()
end)
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