These images were definitely not made with the CAM tools, however something is wrong with them. While they look too good to be fan made, some level designs make no sense:
-The 3rd image - Not only is there no challenge in this level design, the meat grinder is there, yet lacks its blade. It could mean, however, that the bombs and blade were simply not programmed into the level yet.
-The last image - It's just like the same as the 3rd image. It is impossible to get to the lever. But again, it could just mean the rest of the elements were not programmed yet.
From a programmer and game creator point of view, I can't see any reason why would they only implement Mudokons in these levels. They should be just as easy or hard to implement as any other object. From a first look it really seems like a photo-montage of the CAM file, and original level (to restore some of the objects), and some other CAM file; however, some really complex backgrounds were restored or drawn in these images, so I'm really doubtful they're manipulated.
I really hope these are real, and I'd love to put my hand on any beta Oddworld game.
On the same topic, here are some screenshots from the Oddworld Gallery that are different from the final version. If anyone could comment on their source it would be helpful.
http://oddworldlibrary.net/archives/...=SSAE0015.jpg1
http://oddworldlibrary.net/archives/...=SSAE0008.jpg1 - Red eyed muds?
http://oddworldlibrary.net/archives/...=SSAE0025.jpg1 - The sign looks different
http://oddworldlibrary.net/archives/...=SSAE0011.jpg1 - Different font
http://oddworldlibrary.net/archives/...=SSAE0017.jpg1 - Slig in a different position, and different font. Muds are red eyed.
http://oddworldlibrary.net/archives/...=SSAE0019.jpg1 - The gates are opening instead of closing.
http://oddworldlibrary.net/archives/...=SSAE0087.jpg3 - There should be Sligs here
http://oddworldlibrary.net/archives/...=SSAE0116.jpg4 - These type of security orbs are present only in Abe's Oddysee
http://oddworldlibrary.net/archives/...=SSAE0181.jpg6 - Leading Zeros
http://oddworldlibrary.net/archives/...=SSAE0184.jpg7 - How did he get there?
I didn't check all the images, and these are only from AE, but there are probably more. Some of the beta images (Like this one:
http://oddworldlibrary.net/archives/...=SSAE0017.jpg1) seem to have really high quality compared to the release PC version. How can this be explained? (Unfortunately, it's impossible to get this quality in the final version

)
Edit: These high quality graphics possibly in the Oddbox version of the games? I'd sure love it!