http://freespace.volitionwatch.com/blackwater/fs2_open_Bobboau_12-30-06.zipposting a new build, mostly worked on skybox related things so posting it in here.
IP had comunicated that he had a crash useing his model with my build, I have not been able to reproduce this, even useing his model.
this new build supports a few neat little features related to skyboxes.
in the mission file you can now add a few options to your skybox, unfortunately FRED does not suport these yet, but it's only a matter of time.
$Skybox Model: gasy.pof
+skybox_flags: ("MR_NO_GLOWMAPS")
+dynamic_skybox
you see the two new options, +skybox_flags: and +dynamic_skybox.
sence +dynamic_skybox is the easiest to explin I'll do it first, this is a bit of a mission flag that specifys that the sky box changes a lot, the only effect it has is that the environment map will be updated every frame (note, this is _->*VERY*<-_ expensive) you should only use this with either highly optimised backgrounds/models or in situations were there aren't going to be a lot of ships in missions (would probly be usefull in 'story' missions).
now, the +skybox_flags: options are probly the more usefull overall, this will give you total controle over how the model is going to be rendered.
the available options are: MR_NO_LIGHTING, MR_ALL_XPARENT, MR_NO_ZBUFFER, MR_NO_CULL, MR_NO_GLOWMAPS.
MR_NO_LIGHTING, no lighting will be applied to the model.
MR_ALL_XPARENT, the whole model will be drawn with additive alpha blending.
MR_NO_ZBUFFER, will not read or write to the zbuffer.
MR_NO_CULL, polies faceing away from the camera will still be drawn.
MR_NO_GLOWMAPS, obviusly, won't use glowmapping.
under most situations you will want to use either all or none of these, but there are some situations were you might find you need just one flag. (if you don't specify any flags it will use: MR_NO_LIGHTING, MR_ALL_XPARENT, MR_NO_ZBUFFER, and MR_NO_CULL by default)
I also fixed a few bugs like stars will no longer draw through a skybox if you don't want it to, though you won't notice any difference if you leave the default flags (as it uses additive alpha)
keep in mind the old -amb and -trans texture flags are still in effect.