Tria is a comfortable and dynamic trestle inspired by “Penrose triangle”. In Tria project I try to bring this optical illusion from 2D to 3D using a white guideline on structure faces. The interesting feature of this trestle is that you can see the illusion only looking at it from a specific angle, so any observer will have a personal point of view. Tria is composed of a “z” base in spruce and two vertical aluminum profiles which support the top.