If anyone's interested in DKCR 3D, I cracked the RST0 archive format + the compression it uses and wrote a tool to extract the files out. You can download it here: https://www.dropbox.com/s/fvxzkflshjn1rd5/RSTExtract.rar?dl=0
There's a ton of format differences compared to the original DKCR (which is probably not the most surprising thing ever, considering it's on different hardware). There's actually some pretty interesting stuff in there, too - it seems like there's more metadata than the original game, so there's stuff like filenames for every file and even something that looks like object parameter names. I'm not sure if the stuff I worked out should go on the wiki, since I don't think Retro did the port, but ehhh I don't see too many reasons why not?
edit: I went and wrote up what I figured out on the Wiki, so here it is
There's a ton of format differences compared to the original DKCR (which is probably not the most surprising thing ever, considering it's on different hardware). There's actually some pretty interesting stuff in there, too - it seems like there's more metadata than the original game, so there's stuff like filenames for every file and even something that looks like object parameter names. I'm not sure if the stuff I worked out should go on the wiki, since I don't think Retro did the port, but ehhh I don't see too many reasons why not?
edit: I went and wrote up what I figured out on the Wiki, so here it is