FOSS gamedev and creative worlds

As title , i was testing skyblock mod,and i have a thought. maybe it's interesting to make skyblock's world to re_generate minetest block(dirt..flower...ore...and so on) around the『Skyislands』.

is it possible ? i have read develope wiki,but has no idea.

tks...

Maybe I can use worldedit tool to delete default:air ,I think.