We no longer have to maintain this standard manually. I actually suggest making booster sectors use the lightlevel of their surrounding sectors so that only the booster itself glows.
(OGL support is commented out, since it conflicts with sal-lighting and should probably be done there)
The skybox rendering process has been replaced with portals instead. Those are generated after the first BSP tree pass by looking for existing sky visplanes at the time, and their windows are used to define new portals.
The skybox portals are still incomplete and cause visual glitches when masked elements are involved.
Split portal-related code to its own source files.
Most of the 2-line-specific setup has been moved to the function which adds a 2-line case. The portals should render as they used to so far, anyway.
* Make MT_GHOST's encoremapping depend on whether the source was encoremapped.
* Revamp how sector typegroup 2, type 15 inverts the encoremapping (so planes don't get awkwardly desynchronised).
* Objects!
* Gone is the arcane, difficult-to-remember list of random flags. Say hello to MF_DONTENCOREMAP!
* Alternatively, if the object has a skincolour applied to it, it isn't encoremapped either. (Useful for ghosts, for example.)
* Sectors!
* The autodetecting of sneaker and spring panels is now much more intelligent, and only avoids remapping the plane(s) the effect is availible upon.
* Sector special group 2 no. 15 is now "Invert Encore Remap". It inverts the above detection.
* Linedefs!
* The "Transfer Line" linedef flag can now also be used to deny Encore remappings on linedef textures.
* Right now it applies to every pixel drawn specifically belonging to that linedef, but if people decide it needs changing, we CAN make it apply to midtextures only (like linedef types 900-910).
* Palette remaps.
* Branding.
TODO:
* Doesn't work in GL. (Mostly.) I have SOME ideas on how to tackle this, but...
* Transmaps are broken in Encore for some reason.
* I tried to make in-level colormaps shimmy over, but it didn't quite work, so I commented it out and only semi-fixed it.
