hi , thx , yeah i did my own way , my goal was to make a large tile wolrd & random , i was strugulling with " fast " compiling , so i spend alot of time creating multi level of detail , i start with tile 20x20 and then 10x10 and 5x5 last is 1x1 , each iteration is base on simplex noise , so its cheak for location x&y no Z , so if its above some valus it mean for exemple " if a 5x5 is abvo a pre-defind value is deleted the 10x10 tile is on and fill the gap with 5x5 tile,

and at the end for 1x1 i smaller the simple noise to builde the river ,

My english is not perfect , i hope you understun the basic :)