How do i add a NEW doomguy face (not replacing his old ones)

[cyclopshark]

Im making a mod where doomguy's mugshot changes when he picks up the partial invisibility, like how in quake when the ranger's face vanishes and you can only see his eyes. How do i add a new mugshot in that's scripted to appear when doomguy goes invisible?

[DNSKILL5]

I imagine it would be useful to know what source port, if any, you plan to use for this effect before anyone can offer any meaningful help. 

Edited November 18, 2023 by DNSKILL5

[cyclopshark]

gzdoom

[cyclopshark]

is it something to do with SBARINFO?