SC2Mapster

ATTENTION
Model variations for portraits do not work as I originally thought they did (reminder to always test in-game before uploading anything), instead of varying per unit (like I thought they did), they instead vary whenever that portrait is 'created' (whenever it shows up on screen, like when selecting a marine and the portrait appears) which means that even when selecting and deselecting the same marine the portrait will be random every single time, and when tabbing through different marines their portraits will be the same as each other (since the portrait remains on screen and is never removed, and therefore cannot be 'created' again).
TL;DR
Model variations for portraits don't work how I thought they did, you can still use these for individual marines like heroes or something but they will not work as I described for random portraits.

HOWEVER
It is possible to still implement random portraits through actor events (look at how the Dark Templar actor does it, then convert that to work off of Pass Chance rather than variation).
Or if you want to go a step further, you can duplicate the marine model (in the files, not the data editor) into the same folder, give the marine unit model variations, then copy the Dark Templar actor events wholesale. This has the added benefit of allowing you to set the variations of individual marines in the editor if you want to.

v1.1: Fixed the size of Marine Static Portraits, they exported incorrectly last time and I didn't think to check.

11 marine portraits and static portraits (10 unique + 1 Alt).

Aside from the textures, all portrait models are completely identical.

All 'team color' from the marine suits has been set to grey and all faction identification has been removed so they can be used with the marines of any faction you like.
Pack includes all necessary textures and static portraits.

Please @ me on the SC2Mapster Discord if there is any issues.