Troika will be exhibiting Testing Time in Bread and Jam, a series of exhibitions taking place in a gutted and soon to be refurbished house in 52 Whitbread Road, Brockley, London.

The show, including Troika's new sculpture Polar Spectrum, explores the theme of perception, what it is influenced by, its relationship with the concept of truth and the differences between subjective experiences.

"Don't Touch anything and you'll be safe, You're very close to death."  says Sebastien Noel. We're huddling under a shed of sorts built from small timbers and draped in plastic. The structure covers a 5 by 10 foot sheet of woven matte photo paper that is sprawled across  tempered-glass table, which the Franco-Italian artist and his German partners, Eva Rucki and Conny Freyer, known professionally as Troika, use to create their increasingly popular "light: drawings.

Much contemporary art (though perhaps all art, always) has trust issues. It asks us to question what we think trustworthy. Take Troika's 'Limits of a Known Territory', a site-specific installation currently on display at NC-arte in Bogotá.