New livery, the "Excursion Black" scheme 4449 wore shortly before and after the BNSF excursion (similar to the actual excursion livery, but without the BNSF roundels and with "Southern Pacific Lines" lettering on the tender).

Model smoothing (especially on the nose).

New whistles (again)! Both a SP 6-chime and a Hamilton 3-chime, depending on which version of the train you're using.

UV edits to wheels (they finally have the proper stars in the center of the drivers!).

LOD models (potato mode).

Collision boxes and ladders on both locomotive and tenders (walk and climb all over!).

Remastered auxiliary tender (less janky, more detailed, and with the proper ladder shape).

Also somehow I decreased the overall file size again. I actually don't know how that happened, but hey.

Added bell, custom acceleration and speed values, and pantograph support because I know someone's going to stick one on it so it might as well be in a good spot.

Added snow layers to all locomotives and tenders

Fixed small gaps and inverted normals on open-skirted versions

Plow support.

I forgot to do a proper thumbnail for the new livery :(

73% reduction in mod download size!

Converted everything except basic Daylight variants to Train Mod Liveries

Resolved a few naming inconsistencies

Completely reworked model set-up for easier livery-ing

Added all-black postwar variant

Removed broken duplicates of black-rimmed Daylight locomotive and WPRR tender

Added WPRR/PNWR tender variant based on an October 1995 publicity tour to promote the opening of the Portland & Western Railroad

Fixed thumbnail and moved number boards to rear-mounted position for black-rimmed Daylight

Added "black rims" version of Daylight livery.
Removed painted rims from all rear trucks and all tenders
Altered both War Black liveries to have black driver rims

All locomotives and tenders now feature working headlights!

Additionally, locomotives feature cab lights and simulated Mars lights.