1. A computer implemented method for modifying an object, the computer implemented method comprising: obtaining tracking data that identifies a location of a set of avatars in relation to a range of the object, wherein the range comprises a viewable field; responsive to detecting a condition for triggering modification of the object, calculating modified pixel color values to form a modified color; and modifying a color of the object to form the modified color when the location of the set of avatars is within the range of the object.