A method comprising: receiving an indication of a field of view associated with a three-dimensional, 3D, image being displayed on a head mount display, HMD; receiving an indication of a depth of view associated with the 3D image as focal depth of a user viewing the 3D image being displayed on the HMD; selecting a first right eye image and a second right eye image based on the field of view; selecting a first left eye image and a second left eye image based on the field of view; in response to receiving the indication of the depth of view: combining the first right eye image and the second right eye image by overlaying the second right eye image on the first right eye image, wherein overlaying comprises shifting the first right eye image horizontally with respect to the second right eye image until a portion of the combined image is sharp at the depth of view, and combining the first left eye image and the second left eye image by overlaying the second left eye image on the first left eye image, wherein overlaying comprises shifting the first left eye image horizontally with respect to the second left eye image until a portion of the combined image is sharp at the depth of view; and displaying the combined left eye image and the combined right eye image on at least one display of the HMD. receiving an indication of a field of view associated with a three-dimensional, 3D, image being displayed on a head mount display, HMD; receiving an indication of a depth of view associated with the 3D image as focal depth of a user viewing the 3D image being displayed on the HMD; selecting a first right eye image and a second right eye image based on the field of view; selecting a first left eye image and a second left eye image based on the field of view; in response to receiving the indication of the depth of view: combining the first right eye image and the second right eye image by overlaying the second right eye image on the first right eye image, wherein overlaying comprises shifting the first right eye image horizontally with respect to the second right eye image until a portion of the combined image is sharp at the depth of view, and combining the first left eye image and the second left eye image by overlaying the second left eye image on the first left eye image, wherein overlaying comprises shifting the first left eye image horizontally with respect to the second left eye image until a portion of the combined image is sharp at the depth of view; and combining the first right eye image and the second right eye image by overlaying the second right eye image on the first right eye image, wherein overlaying comprises shifting the first right eye image horizontally with respect to the second right eye image until a portion of the combined image is sharp at the depth of view, and combining the first left eye image and the second left eye image by overlaying the second left eye image on the first left eye image, wherein overlaying comprises shifting the first left eye image horizontally with respect to the second left eye image until a portion of the combined image is sharp at the depth of view; and displaying the combined left eye image and the combined right eye image on at least one display of the HMD.