Chris Ofili

When I was painting in art school - and I think many painters in the 1980s worked similarly - a finished painting would often be constructed from lots of other paintings underneath. Some of these individual layers of painting were better than others, but that was something that you would often only realise retrospectively.

When people said Africa would change me, I didn't understand what they meant. To see the poverty in the townships, for instance, is overwhelming. I found it heart-wrenching to see young children walking barefoot and hungry in the dirt. I'm the kind of person who wants to change the world right here and now, so I got frustrated.

I'm one of those people who is colour blind to a certain degree. And that doesn't mean I'm not acutely aware of race in our country and abroad and in the world. I know what's going on, and I'm very aware of it.