Abstract: A computer system displays, in a three-dimensional environment, a computer-generated object; detects that a user's attention is directed to the object; and in response, displays a virtual shadow for the object with a first appearance, including displaying the shadow with a first value for a first visual property, while maintaining a pose of the object relative to the three-dimensional environment. While continuing to display the object in the three-dimensional environment, the computer system detects that the user's attention has ceased to be directed to the object; and in response, displays the shadow for the object with a second appearance that is different from the first appearance, while maintaining the pose of the object relative to the three-dimensional environment. Displaying the shadow for the object with the second appearance includes displaying the shadow with a second value for the first visual property. The second value is different from the first value.

Abstract: A computer system concurrently displays a view of a physical environment; and a computer-generated user interface element overlaid on the view of the physical environment. An appearance of the computer-generated user interface element is based on an appearance of the view of the physical environment on which the computer-generated user interface element is overlaid. In response to an appearance of the physical environment changing, the appearance of the computer-generated user interface element is updated at a first time based on a graphical composition of the appearance of one or more portions of the physical environment at different times prior to the first time, including: an appearance of a first portion of the physical environment at a second time that is before the first time; and an appearance of a second portion of the physical environment at a third time that is before the second time.