I've been experimenting and will defer to inibuilds for any corrections in my findings.
The "inibuilds-aircraft-a300-600-lowtextures" package the installer gives you the option of dropping in the community folder only reduces the size of the base textures....not the textures of the individual liveries, each in their own separate folder.
With 8k textures you can quicky overwhelm memory if there are too many and or the file sizes are huge. Now this can vary greatly from paint to paint....I can tell you if you're flying the Emirates paint...its textures are a whopping 732 Megabytes.
On the other hand, DHL texture.AHK_LDA is only 357 Megabytes.
I took the FedEx paint and reduced the 8k maps to 4k that were 64mbs each and the folder size now a respectable 231 Megabytes. Here is a comparison of the 2 folders, with my new, smaller FedEx on the right and Emirates 8k. Look at all those 65 mb files!
I have noticed that performance is better (7800X3D, RTX 4070ti)...and if you're wondering about quality loss...
8k on UPS...
My 4k FedEx
4k still gives you incredible resolution, and unless you're flying with your nose touching the skin of the aircraft, the details look fine (incredible in fact) at a normal viewing distance.
Results can vary widely from paint to paint...actually depending on the colorization of the actual pixels. This is because the DDS compression algorithm groups pixels with the same color and assigns them a code to render all those pixels when it sees that code...vs reading each pixel individually. So...even though an all-white livery has the same amount of pixels as a lavishly painted one, it will render faster because there are fewer unique colors to assign codes to overall. Even though the file size of both will be exactly the same...they will render in the game at different rates.
This brings us to the natural conclusion that even though 8k textures are phenomenal to look at... 4k will get you better performance with a good trade off in quality loss (in my opinion). Now, since I'm a painter I can easily change the maps from 8k to 4k, I can not... of course distribute them, so don't even ask. 😉 They are the painter's/inibuilds property and the EULA states that I can't redistribute.
I'm hoping for the community, that inibuilds will ask the painters to create 4k versions, much like another popular Airbus company did with great success. 🙂
Overall..this plane is OUTSTANDING...the texture work is next level, and I'm blown away with the results!