na-adjective
picturesque; scenic
Describes a scene, view, or composition that is visually striking and reminiscent of a painting, often in a positive, aesthetic sense.
その村は絵画的な風景で知られている。
The village is known for its picturesque scenery.
彼の説明はとても絵画的で、情景が目に浮かぶようだった。
His explanation was very graphic, and I could vividly picture the scene.
美的 means 'aesthetic' in a broader sense, while 絵画的 specifically evokes the quality of a painting or visual art.
Formed from 絵画 (painting, picture) + 的 (-like, -tic). The exact historical derivation is straightforward; the word follows a common pattern for creating adjectival nouns.