Thanks for the reply WIll.  After checking the scoll text in the intro screen of the original "Companion" disk (running in DOSBox) I can see that those levels were not designed by DMA but by Mark Tsai, one of the authors of the book.  There's no information in the scroll text of the Covox disk but I would guess that those levels were also outsourced.

Quote from: WillLem on May 09, 2021, 02:45:24 PM
I'm pretty sure that Lemmings is "high resolution" on the Amiga, so perhaps the entire screen was in fact running at the same resolution. I'm not certain of that, though...

The main playing area is low res on the Amiga.  However, the intro screens and in-game icon bar are in "high res" (640 pixel horizontal resolution) so they look crisper than on other versions.  I think the Mac port was the only contemporary version that was high res throughout.

Quote from: namida on April 30, 2021, 09:55:35 PM
Mike Dailly mentioned in an interview that there were hundreds of levels that didn't make the cut. To the best of my knowledge, only two such levels (three including this one) have been seen publicly in any form - "One Way To Freedom" was included in a demo version, and "The Sky At Night" was shown on-screen in said interview (but has never been playable to the public). It's also plausible that some of the unique / replacement levels in versions released around the same time as Amiga (eg. Amiga budget / bookclub versions, Mac's alternate Tricky 21) could be from the cut levels, but we'll likely never know for sure - it's equally possible they were made on-demand.

The history is fascinating.  Is anything known about the following?

a. Was the original Amiga level editor ported to other platforms, or were were the official levels all created on the Amiga?  The youtube video shows that the Amiga editor uses the hardware to show high resolution text under the main low resolution game area, which would not have been possible on a contemporary PC.  I have also noticed that the palettes of the "special" levels in the PC-exclusive Companion and Covox sets have all their RGB levels rounded to a multiple of 4, indicating that they were created on an OCS Amiga (which only had 4 bit RGB resolution, rather than the 6 bits available in VGA).
 
b. Were the unique Genesis levels designed by DMA, or were they outsourced?  Same question for the Companion book and Covox levels.