1. A non-transitory computer-readable storage medium having stored therein a display control program which is executed by a computer of a display control apparatus that displays a three-dimensional virtual space on a display apparatus capable of stereoscopic display, the display control program causing the computer to perform features comprising: placing virtual objects including a first object in the three-dimensional virtual space; specifying a distance between the first object placed in the three-dimensional virtual space and a viewpoint position based on positions of a left virtual camera and a right virtual camera used for virtually shooting the virtual space; setting, in accordance with the specified distance, a degree of transparency of a part or entirety of the first object such that the longer the distance is, the higher the degree of transparency is; generating an image for a right eye and an image for a left eye by shooting the three-dimensional virtual space with the right virtual camera and the left virtual camera, respectively, so that the first object, which is included in each of the image for a right eye and the image for a left eye, has the set degree of transparency; and displaying the generated image for the right eye and the generated image for the left eye on the display apparatus.