Ian Davenport developed a cool technique of pouring paint down surfaces, allowing paint in works like Giardini Colourfall to pool at the bottom. Here's a nice behind-the scenes in English:
https://www.youtube.com/watch?v=a_suSZaeY0U
Reminds me of work by Holton Rower:
https://www.youtube.com/watch?v=Gyktr2OI4v4
https://www.youtube.com/watch?v=d6egUsZvWu4
• Behind-the-scenes: Ian Davenport @ HANA Building, Singapore (YouTube / Art Plural Gallery)
