minetest.register_on_generated(function(minp, maxp, seed)


	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
	local area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
	local data = vm:get_data()

	for z = minp.z, maxp.z do
		for y = minp.y, maxp.y do
			for x = minp.x, maxp.x do
				local vi = area:index(x, y, z)
				if data[vi] == minetest.get_content_id("air") and math.random(100) == 1 then
					data[vi] = minetest.get_content_id("default:bush_leaves")
				end
			end
		end
	end

	vm:set_data(data)
	vm:set_lighting({day=0, night=0})
	vm:calc_lighting()
	vm:write_to_map(data)

	for z = minp.z, maxp.z do
		for y = minp.y, maxp.y do
			for x = minp.x, maxp.x do
				local vi = area:index(x, y, z)
				if data[vi] == minetest.get_content_id("default:stone") and data[vi+area.ystride] == minetest.get_content_id("air") and math.random(5) == 1 then
					minetest.place_schematic_on_vmanip(vm, { x = x - 4, y = y, z = z - 4}, minetest.get_modpath("default").."/schematics/acacia_tree.mts", "random", nil, true)
				end
			end
		end
	end

end
)