UglyFast76
This is a replacement for all of standard F76 Season4 with May Update textures files:
SeventySix – Textures01.ba2,
SeventySix – Textures02.ba2,
SeventySix – Textures03.ba2,
SeventySix – Textures04.ba2,
SeventySix – Textures05.ba2,
SeventySix – Textures06.ba2,
SeventySix – Textures07.ba2
SeventySix – GeneratedTextures01.ba2,
SeventySix – GeneratedTextures02.ba2
SeventySix – 00UpdateTextures.ba2
Installed by removing them from Fallout76.ini and adding
sResourceIndexFileList = t8-64-128-3201.ba2, t8-64-128-3202.ba2, t8-64-128-3203.ba2, t8-64-128-3204.ba2, upd00-8-64-128-32.ba2
Another tweak for playing full-screen 1920×1080 with rendering of a quarter res picture:
[Display]
iSize H=540
iSize W=960
bFull Screen=0
bBorderless=1
bMaximizeWindow=1
Textures 128×128 and greater are downsized to 32×32 … 128×128 (flexible logic, 4-16x downscale, default 8x), interface textures are downsized by 2x, notes/newspapers/maps are not touched, recompressed to BC1 (most) /BC3 (transparency) /BC4 (greyscale)/BC5 (some exceptions based on format). Mipmaps are present where they were present – though it’s possible to completely omit them to save space.
Archive2 packed DDS with 64×64
Done using Archive2 from FO4 Creation Kit, custom-patched Fallout4-Texture-Compressor-3.0 (fixed some bugs – now no extra space used, no useless writes – speed increased a lot, added some more logic, still have some issues and unfinished functionality), newest texconv/texdiag from DirectXTex (Jan 2021) and their hybrid – Texconvalize that is used instead of texconv+texdiag (writing intermediate BC3-compressed file to disk) for determining transparency w/o writing of the intermediate file to the disk. Whole operation requires 40GB to uncpompress textures and some CPU to recompress.