ho costruito castello e in parte dipinto come rendere piu reale?
Google translate: I built the castle and how to make the picture more real?
To make the stonework look more realistic, I would suggest giving the whole structure a watered down wash of dark brown acrylic paint, then work with various drybrushes of lighter browns, greys, and even greens here and there (especially at the lower parts).
Add some structures to the insicde walls (stables, blacksmith), and maybe a well and a watering through.
And, of course, you need to populate the castle with
guards, servants, knights, and courtiers Igor, wolves, and scantily clad female vampires

For the base: Glue sand to it, paint it as earth, and add clumps of static grass and foliage - gives a MUCH nicer finish than a painted golf lawn. Really!