HUD Transparency: Files Related to Buff's

I want to make the complete Main HUD kind of transparent.
(for better immersion and a small fear of burnin on OLED :sweat_smile:)
So far the hud_main.dds is a solid access for the most things.

But i can’t find the Buff icons in the textures,…
I found the your_friendly_neighbor.dds but adjusting the alpha did not have any impact.
In combination with the buff_grey.dds

it has no effect on the hud or the buff section in the character screen.

I tried the above cause there is no complete icon for the buff icons ( for instance for the balanced diet buff).
My solution until now is to disable main hud visibility in the table section in the buff.xml

anyone ideas?