I found one “verified” 4K HDR rip with the shifting aspect ratios (opens up to 1.78:1 on Miller’s planet and the tesseract). The image was crisp, and the bass from Hans Zimmer’s score came through clean. But the download took 3 days, no seeders after, and the file crashed on two media players.
When downloading from a legal retailer or ripping your own disc, look for these keywords to ensure you have the correct version: Aspect Ratio : Should be listed as "2.39:1 / 1.78:1 (IMAX Scenes)." interstellar imax version download verified