First the 3D plugin, then the lake module, and now this amazing feat! Steve, you're the master of background manipulation. I quite honestly think that the background in the module looks just as good as those in Post Mortem.
Am I right in assuming that the effect would still look quite rough in 640x480 resolution since RawDraw only works with 320x200 coordinates? It would of course be possible to do it per horizontal pixel with a bit of resizing in-between the copying, deformation and drawing, but it would most probably be very slow and doubling the amount of dynamic sprites needed.
Instead I was wondering if you have any plans to add a Myst-mode to the 3D plugin, using the full 3D rendering to create a panorama textured SkyBox room with the player in the middle? As it is now, it's perfectly do-able by scripting with sprites as textures. But how much work do you think it would take to use a background for texture like here, and add hotspots through the editor? A six surface room does add the problem of floor/ceiling though, and how they would be placed on the background frame.
I should remark that I don't intend to use such a feature myself - I wouldn't even know how to make the background renders - I'm merely curious, since I'm doing a lot of RawDraw based scripting myself and know about the limitations and my own attempts to overcome them.
So many people have been asking about Myst-like panoramas (or later games in the series rather), and now you've come a very long way in fulfilling that wish. You're making a lot of people happy with this. Awesome work!
I just read the manual and saw that the module was hardcoded to 320x240, so that answers part of the question I guess.