There are many drawings. I don't know where you have been practicing. Learn the paintings of early NPC professors. After 350, the Astral Consortium has many drawings, but they need prestige. There are 375 drawings on the island and seamounts, which also need prestige. There are monsters that randomly drop blueprints, and Haishan boss drops purple pictures.

It is suggested to respect the reputation of quicksand first, buy all the drawings there, and then buy the rest on the Japanese island, which can save a lot of money.

Harlan has a blue stone painting, some paintings sold by Karazan's cluster merchants, some paintings sold by Storm Tower, some paintings by slums and punctuators, some precious stones unique to Chatta jewelry, some paintings by senario and some paintings by violets.