Usually a heightmap is x,y grid (2d array) with values between 0 and 255 which represent a grey scale value. Sometimes these values could also be -1 to 1 or 0 t

Usually a heightmap is x,y grid (2d array) with values between 0 and 255 which represent a grey scale value. Sometimes these values could also be -1 to 1 or 0 to 1 or something similar.