• Diagon Alley 1
• Diagon Alley 2
• Diagon Alley 3
• Hogwarts Exterior
• Hogwarts Snowy
• The Greenhouse
• Aragog's Lair 1
• Aragog's Lair 2
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Hogwarts exterior early Dpaint mockup:
Here you can see a tilemap mockup designed for the Howarts exterior levels including big castle walls, the lower part of the Whomping Willow and a very early Hagrid's Hut.

Hagrid's Hut had to be redrawn later when movie reference started to appear. You can view the screenshots section to see the final result. Most of the graphics were used as you find them here.