A computer program product comprising an information processing program executable by a computer of an information processing apparatus for causing a display device to display an image representing a state of a virtual world based on a virtual, the information processing program causing the computer to execute: a reference image storage step of storing, as a reference image, an image generated at a time when at least one of a movement of the virtual camera and a rotation thereof is stopped; a shift width/combination ratio setting step (S43, S51) of setting a shift width which is gradually reduced as a time passes from the time when at least one of a movement of the virtual camera and a rotation thereof is stopped, or setting a combination ratio which is gradually reduced as a time passes from the time when at least one of a movement of the virtual camera and a rotation thereof is stopped; an images-to-be-combined generation step (S41, S42) of generating, using the reference image, images to be combined; a combination step (S5, S6) of repeatedly generating a combined image by combining the stored reference image with the images to be combined, which are displaced by the shift width from the stored reference image or repeatedly generating a combined image by combining the stored reference image with the images to be combined at the combination ratio; and a displaying step for displaying the combined image on the display; wherein the images-to-be-combined generation step includes a blurred image generation step (S41, S42) of rendering the reference image in a rendering memory and generating, as the images to be combined, at least two blurred images of a first blurred image and a second blurred image by blurring the reference image, the combination step includes: a first position calculation step of calculating a first position which is offset by the shift width from the reference image having been rendered in the rendering memory; a second position calculation step of calculating a second position which is offset by the shift width from the reference image having been rendered in the rendering memory in a direction different from a direction of the first position; and a blurred image combination step of combining, with the reference image, the first blurred image disposed at the first position and the second blurred image disposed at the second position so as to generate the combined image. a reference image storage step of storing, as a reference image, an image generated at a time when at least one of a movement of the virtual camera and a rotation thereof is stopped; a shift width/combination ratio setting step (S43, S51) of setting a shift width which is gradually reduced as a time passes from the time when at least one of a movement of the virtual camera and a rotation thereof is stopped, or setting a combination ratio which is gradually reduced as a time passes from the time when at least one of a movement of the virtual camera and a rotation thereof is stopped; an images-to-be-combined generation step (S41, S42) of generating, using the reference image, images to be combined; a combination step (S5, S6) of repeatedly generating a combined image by combining the stored reference image with the images to be combined, which are displaced by the shift width from the stored reference image or repeatedly generating a combined image by combining the stored reference image with the images to be combined at the combination ratio; and a displaying step for displaying the combined image on the display; wherein the images-to-be-combined generation step includes a blurred image generation step (S41, S42) of rendering the reference image in a rendering memory and generating, as the images to be combined, at least two blurred images of a first blurred image and a second blurred image by blurring the reference image, the combination step includes: a first position calculation step of calculating a first position which is offset by the shift width from the reference image having been rendered in the rendering memory; a second position calculation step of calculating a second position which is offset by the shift width from the reference image having been rendered in the rendering memory in a direction different from a direction of the first position; and a blurred image combination step of combining, with the reference image, the first blurred image disposed at the first position and the second blurred image disposed at the second position so as to generate the combined image. a first position calculation step of calculating a first position which is offset by the shift width from the reference image having been rendered in the rendering memory; a second position calculation step of calculating a second position which is offset by the shift width from the reference image having been rendered in the rendering memory in a direction different from a direction of the first position; and a blurred image combination step of combining, with the reference image, the first blurred image disposed at the first position and the second blurred image disposed at the second position so as to generate the combined image.