Cassette with monochromatic or multicoloured geometric effects that allow you to project spectacular animated patterns. Each cassette consists of two layers of glass, one of which is fixed and the other rotating. Each of the two layers of glass works in a complementary way with colour and graphic effects. The simplified mechanical design of the effects cassette allows you to create your own custom cassettes. You can also combine two inverted, identical standard gobos placed slightly off-centre in a cassette to produce amazing effects. (FR Patent No 1903390)