'Bold glamour' beauty filter draws flak, even actress Katherine Heigl hates it

Actress Katherine Heigl tried out the new controversial filter "Bold Glamour" on TikTok. Photo: AFP

Filters are a big part of many social network users' online existence. Adored by some, criticised by others, filters and their use have always been subject to controversy.

But the "bold glamour" filter is particularly shaking up the world of social media. What makes it different? It is essentially undetectable.