Apparently the lead programmer released much of the source code a few years ago here <a href="https://github.com/RandalLinden/DOOM-FX">https://github.com/RandalLinden/DOOM-FX</a><p>But it was uncompilable because of copyrighted assets/code. This seems to be the full source which includes the missing stuff.
Actual source files seem to be here <a href="https://ia600408.us.archive.org/view_archive.php?archive=/3/items/jeffs-doom-snes-disk-images/source.zip" rel="nofollow">https://ia600408.us.archive.org/view_archive.php?archive=/3/...</a>
The backstory for the 3DO port of Doom[0] later in that thread is crazy! Worst sales/negotiation ever.<p>[0] <a href="https://gbatemp.net/threads/doom-for-snes-full-source-code-released-by-former-sculptured-software-employees.657118/post-10439578" rel="nofollow">https://gbatemp.net/threads/doom-for-snes-full-source-code-r...</a>
This was an incredible port, and certainly an engineering masterpiece given the target hardware.<p>The level geometry of this version was more complex than the PlayStation port, and it even had online multiplayer support.<p>One interesting difference though is that enemy sprites only face the player.