Techniques for modifying the appearance of objects comprising a two-dimensional vector drawing are disclosed. Such modifications can be made in response to user input that manipulates a viewing perspective for the drawing. Before a user manipulates the viewing perspective for given scene, information relating to the objects comprising the scene is stored in a data structure. Such information may include, for each object in the scene, a two-dimensional projection of the object onto a reference plane and parameters characterizing the reference plane. Once the user has finished defining the modified viewing perspective, the objects are projected from the reference plane to the modified perspective. The parameters characterizing the reference plane are applied to ensure that the object is rendered at the correct orientation and depth in the modified perspective. Objects comprising the scene can thus be automatically updated in response to the user's manipulation of the viewing perspective.