Hi,
I had this red sky issue (texture not found) on an old PC config (Win7Pro64, Core2 Quad & GTX275). I tested the fix succesfully, no more red sky.
Regarding this patch, i don't know what you did to fix the problem but, on a recent PC, i can't see any graphic difference between the 2 .exe.
Now the good question is "doesn't WarGaming consider that losing the potential amount of players concerned by this fix by not applying it on the next futur official patches, is not important?".
Anyway, thanks for this job.