Texture format information needed

[A_GRIM_OBLIVION]

Has anyone figured out all of the games texture formats yet?

Though the textures can be saved correctly with free paint programs such as Paint.net and Gimp, I use Photoshop.
The ten formats I have found so far are:
. BC1 ----- RGB ------- 4bbp | no alpha ---------------- with mipmaps
. BC1 ----- RGB ------- 4bbp | no alpha ---------------- without mipmaps
. BC1a --- RGBA ----- 4bbp | 1 bit alpha -------------- with mipmaps
. BC1a --- RGBA ----- 4bbp | 1 bit alpha -------------- without mipmaps
. BC2 ---- RGBA ----- 8bbp | explicit alpha ---------- with mipmaps
. BC2 ---- RGBA ----- 8bbp | explicit alpha ---------- without mipmaps
. BC3 ---- RGBA ----- 8bbp | interpolated alpha --- with mipmaps
. BC3 ---- RGBA ----- 8bbp | interpolated alpha --- without mipmaps
. BC4 ---- R ----------- 4bbp | grayscale ---------------- with mipmaps
. BC4 ---- R ----------- 4bbp | grayscale ---------------- without mipmaps --- I have only found one instance of this with a vector image

I'm trying to figure out what the 'passion' billboards are saved as, but am having zero luck.
basegame_4_gamedata\base\environment\decoration\unique\quest\sq023\textures - All six billboard textures

 

[pndrad]

You might want to try discord [link removed]

 

[A_GRIM_OBLIVION]

I've tried Discord... it's usually filled with unknowledgeable 12 year olds, and has not been helpful in the least the last several times I visited it.

Actually, the entire Discord site seems to be geared to pre-teens...