Possible Clues:

• 12-point's so indicative of artist
• Cubist before Rubik?
• Constable I included as very good painter
• Artist — image like so
• Preserved in aspic, as some modern master
• Artist with a blue period
• Artist who had a Blue Period
• Is his art misanthropic, as some maintain?
• Artist Pablo
• Informally photograph as accordingly famous artist