The virtual scenarios that make up this application are designed for the treatment of patients with obsessive-compulsive disorder with cleaning. These are: a public toilet and a home kitchen. Each one has 4 progressive levels of exposure. At level 0, both are neat and clean. In 1, the bathroom begins to get a little dirty and urine remains in the urinals and toilets; the kitchen, meanwhile, becomes more opaque, with used pans and a garbage bag on the floor. In 2, dirt and debris levels increase everywhere in both scenarios. Finally, at level 3, the highest degree of contamination is shown; the two scenarios become extremely dirty and potentially unhealthy.