@boothbabelover This issue does come up a lot but essentially it's as @kosstar said, older models usually have issues when applying newer shader versions because, for example, while Poiyomi 8.x+ is superior to something like Poiyomi Master Shader or previous versions of Poiyomi on paper, the definitions or states established on the older shader do not usually translate between version changes unless they're relatively close in build.

You can upgrade the shader to a new version, but typically if you want to keep most of the definitions intact, you'd need the version that the avatar was created with along with the new version, and migrate as many settings into the new shader as possible to retain previous functionality.

H-39 https://seunchan.booth.pm/items/4175970

Z

Z-1 https://booth.pm/en/items/3702704
Z-2 https://booth.pm/en/items/3726691

Y

Y-1 https://booth.pm/en/items/4026150
Y-2 (No longer available? Not found)
Y-3 https://booth.pm/en/items/3159333
Y-4 https://booth.pm/ja/items/3560999
Y-5 (No longer available? Not found)

W

W-1 (No longer available? Not found)
W-2 https://booth.pm/en/items/4614400
W-3 https://booth.pm/en/items/3445660
W-4 https://booth.pm/en/items/3721548
W-5 https://booth.pm/ja/items/3687277 (No longer available; verified through VRCBooth)

V

V-1 https://booth.pm/en/items/3796095
V-2 https://booth.pm/en/items/3950065

U

U-1 https://booth.pm/en/items/3711963
U-2 https://booth.pm/en/items/4079056
U-3 (Same as Y-3) https://booth.pm/en/items/3159333

T

T-1 https://booth.pm/ja/items/3692842
T-2 https://booth.pm/en/items/3692194
T-3 https://booth.pm/en/items/3709263
T-4 (No longer available? Not found)
T-5 https://booth.pm/en/items/3776641
T-6 (Same as T-5) https://booth.pm/en/items/3776641
T-7 https://booth.pm/en/items/3629714
T-8 https://booth.pm/en/items/3822091
T-9 https://booth.pm/en/items/3725182
T-10 https://booth.pm/en/items/3896004
T-11 https://booth.pm/ja/items/3721541
T-12 (Same as T-11) https://booth.pm/ja/items/3721541

R

R-1 https://booth.pm/en/items/3697530 (Unsure, possible rebrand? Image Mismatch)
R-2 https://booth.pm/en/items/3739024
R-3 https://booth.pm/en/items/3712063
R-4 https://booth.pm/en/items/3706561
R-5 https://booth.pm/en/items/3815641
R-6 https://booth.pm/en/items/3477229
R-7 https://booth.pm/en/items/4018379
R-8 https://booth.pm/en/items/3709907
R-9 (Same as R-8) https://booth.pm/en/items/3709907
R-10 https://booth.pm/en/items/3822539
R-11 https://booth.pm/en/items/3807820
R-12 https://booth.pm/en/items/3818735
R-13 https://booth.pm/en/items/3883627
R-14 (Same as R-8) https://booth.pm/en/items/3709907
R-15 https://booth.pm/en/items/3712820
R-16 https://booth.pm/en/items/3717184
R-17 (Same as R-16) https://booth.pm/en/items/3717184
(Sorry was working on R at the same time as @rwhwrhw D:)

P

P-1 https://booth.pm/en/items/3737405
P-2 (Same as P-1) https://booth.pm/en/items/3737405
P-3 https://booth.pm/en/items/3692009
P-4 https://booth.pm/en/items/3704971

O

O-1 https://booth.pm/en/items/3707827
O-2 (Same as O-1) https://booth.pm/en/items/3707827
O-3 https://booth.pm/en/items/3746688
O-4 https://booth.pm/en/items/3806697
O-5 https://booth.pm/en/items/3689647
O-6 https://booth.pm/en/items/3709899
O-7 https://booth.pm/en/items/3710111
O-8 https://booth.pm/en/items/3705643

N

N-1 https://booth.pm/en/items/4052474
N-2 https://booth.pm/en/items/3689617
N-3 https://booth.pm/en/items/3727507
N-4 https://booth.pm/en/items/3790936

M

M-1 [Same as A-3](No longer available? Not found)
M-2 https://booth.pm/en/items/3739406
M-3 (No longer available? Not found)
M-4 https://booth.pm/en/items/3698192
M-5 https://booth.pm/en/items/3692181
M-6 https://booth.pm/en/items/3790116
M-7 https://booth.pm/en/items/3783564
M-8 https://booth.pm/en/items/3696179
M-9 https://booth.pm/en/items/3762411
M-10 https://booth.pm/en/items/3771374
M-11 https://booth.pm/en/items/3857534

Misc.

0_Kanji-3 (No longer available; Removed from booth https://web.archive.org/web/20220316230507/https://booth.pm/ja/items/3726178 Last saved instance of file)
0_Kanji-9 (Same as 0_Kanji-3)
F-1 https://booth.pm/en/items/3696647
F-8 (Same as T-3; https://booth.pm/en/items/3709263)

The not so simple answer is that you'd need to make the facial expressions replace one another based on a hierarchy, or have the animation set all unused facial blendshapes to 0 while active to prevent expression overlap.

The easiest fix is probably just using Combo Gesture Expressions and filling out each gesture with an animation so that each combo has its own specific animation and cannot overlap since it would technically fire a new animation based on the gesture made.

By default the right hand also overrides the left hand for expressions so you could also set certain animations to the left hand and others to the right and sort of avoid that issue? But that's still pretty complicated, so I'd just recommend making expressions in CGE

@KittyPawz What @Rynaa said is very true, VRChat wants most write defaults set to off and usually people disable them or leave them off. Facial animations usually break as a result of having WD disabled on them.

There was an old method (I think no longer works or just isn't popular anymore?) to have write defaults off and have expressions work regardless, however in most use cases you do want to ensure write defaults for expressions is on, the exception being when you get further into avatar optimization as WD is a fairly complex topic. Cams Avi's gives a pretty surface level explanation with examples on WD if needed. Definitely do check or have a program like AVC3 automate that for you since it can cause issues!

In the case of CGE, I believe it creates a controller on its own that is set up with everything as needed, so it may not be a concern, but I did want to say checking Write Defaults is a valid troubleshooting method as well!

@Asira

As an aside that just reminded me that a Venator set is on the list (https://booth.pm/ja/items/4125502), if you have that file downloaded, when you get to that point in the list I would highly recommend scanning that zip and unity package. The sets i've seen shared usually contain a dll file that usually goes unnoticed, and it will clear Virustotal, it just has a small mention towards the bottom. I don't think I saw the Tactical Bunny set (https://booth.pm/en/items/4486346) on there, however if it is present I recommend the same. I believe I saw the versions shared containing some form of windows executable.

That said, be safe and rest often! Thank you for all your hard work!