5-Point Perspective Drawing or Curvilinear Perspective

A 5-point perspective grid can be seen when looking at fish-eye-lens photography. To have a truly curvilinear perspective, all vertical and horizontal straight lines arch. All vertical lines must bend to the top and bottom points. All horizontal lines must bend to the left and right points. All lines going into picture plane, towards the horizon line, must go straight to the center point. All of your architectural lines should follow these rules. Organic shapes, like trees, do not necessarily need to go to the points. However, if you look at your drawing and something seems off, check and make sure that you are using your five points correctly.