
Chapter 1
The mysterious man of Den Bosch
Chapter 2
Decoding the dreams
Chapter 3
Secrets of the brush
Chapter 4
The ripple effect
YOUR GOAL
Master of The wild world of Hieronymus Bosch
Ch 3 · Secrets of the brush
andy Secrets of the Brush
Look beneath, look beneath! A secret sketch is waiting underneath.

andy Four simple medieval pigments—azurite, malachite, vermilion, and toxic lead-tin yellow—fueled the vivid colors and glowing fires of Bosch's

andy Charcoal sketches of deleted monsters appear beneath the cracked layers of oil paint.
Fun Fact
Hidden sketches: Infrared scans of 'The Garden of Earthly Delights' show that Bosch originally sketched a giant dragon that he later painted over.
Glossary
underdrawing (noun)
A preliminary drawing made on a surface before paint is applied over it. Bosch sketched these preliminary underdrawings on oak panels using a coarse brush and thin paint.
A preliminary drawing made on a surface before paint is applied over it. Bosch sketched these preliminary underdrawings on oak panels using a coarse brush and thin paint.
Quiz
What do the underdrawings of Hieronymus Bosch's paintings reveal about his creative process?
