Hope I didn't miss much of it.
As for custom music, I have done the possible with the limited tools I wrote by cracking myself the music format. There's one original song (the night "town" music) which I think turned out quite well, but I didn't want to write more because it would be hard to make them sound good without hours and hours of work and I was too busy trying to solve dozens of small problems everywhere.
Mastery: You are using an inadequate video plug-in (there's a reason a readme.txt file is included!). I'm not sure what is going on in the end, I couldn't reproduce whatever bug you had there.
Edit: About the camera: the main problem of the camera is that the original Mario 64 camera is broken. It only works because there are tons of hardcoded camera positions for each level, and I (or anyone else) couldn't yet get rid of this.
edited 9:24 PM EDT May 12, 2009
Here is the save state:
M64-TheMissingStars.pj.zip
About the camera, the hard coded camera positions isn't really the nuisance, but rather that you're restricted from angling the camera into logical positions, and that it tends to go in the opposite direction of what'd seem logical to be at.
edited 10:48 PM EDT May 12, 2009
Mastery: that's strange, the grass texture coordinates look messed up, and the only plug-in with this problem (from the ones I've tested) is Jabo's 1.5.2. The camera angle limitations are also part of hardcoded (on a level basis) stuff. There are dozens of different functions affecting the camera coordinates at once, so it's really hard to understand it and thus overcome these problems.
http://www.mediafire.com/download.php?zhqojiu3tgy
Nemu is the only emulator that seems to care about the alignment, since it wouldn't run the extended ROM before and now it works perfectly. That's great, because I had to resort to PJ 1.4 debugger (ugh) to correct some bugs and now I can use Nemu 64.
Now let's see if it works on real hardware. If so, I want PICS :). Patch it to the normal (non-aligned) output of the extender.
Also, for those interested or merely curious about it, here is pretty much all source code for the assembly/C hacks used:
http://sites.google.com/site/messiaen64/themissingstars/download/missing_stars_src.zip?attredirects=0
(Warning: I'm an amateur programmer!)
I guess if I can correct some of the messed up display lists maybe it can work reasonably. I will try doing some tweaks in the RSP commands of the 'basic objects' and producing a new patch.
Now would be a good time to try some low level video plugins :P.
Edit: Yep, the Z64 plugin seem accurate enough to reproduce most of the graphical glitches, I'll see what I can do.
edited 5:53 PM EDT May 17, 2009