How to fix Blendshapes breaking when importing into Unity?

[bdawg]

Hello!

Please Click This Link To See Relevant Photos >> https://imgur.com/a/1jxGPG4 (They won't post here)

I am having a consistent problem that I do not how to fix, and I don't have many friends in my life who know Blender or are willing to help me out so I was just wondering if anyone here would give it a shot...

I am currently trying to merge this asset:

愛莉(Airi)用お○んこ P○ssy for Airi【メッシュ結合 手順書有】 - ないならつくろう - BOOTH

オリジナル3Ｄモデル「愛莉」Ver.1.01 (キュビクローゼット) https://booth.pm/ja/items/6082686 用のUnity用3Dモデルです。 愛莉 ver1.01をベースに作成しています。 本商品は、Modular Avatarを使用して導入できるPrefabの他、 メッシュ結合を行う場合の手順と補助Prefabが同梱されています。

(booth.pm)

To this avatar:

オリジナル3Ｄモデル「愛莉」Ver.1.01 - キュビクローゼット - BOOTH

期間限定で9月11日 23：59までセールです。 5,500円 → 4,500円 (1000円OFF) 기간한정으로 9월 11일 23:59까지 세일입니다. 5,500엔 → 4,500엔 (1000엔 OFF) +++++ VRCSDK SDKバージョン3.7.0以上から適用される「VRCRotation Constraint」を使用しています。 +++++ +++++VRCSDK SDK 버전3.7.0 이상부터 적용되는 'VRC Rotation Constraint'를 사용하고 있습니다.+++++

(booth.pm)

Since I like how dynamic the additional blendshapes are for uhm.. funny business.

I have, in the past, attempted a similar thing with another Booth model and encountered the exact same problem, so I am confident there is something crucial that I am missing.

Whenever I import my FBX from Blender into Unity, if any blendshapes are enabled, even the one's it originally comes with, it makes the avatar seem super messed up.
The blendshapes work perfectly fine when actually in Blender and everything seems great, but when I pull the model into Unity it looks totally awful.
(See Relevant Photo Via Link)

Is there a specific step I would be missing when exporting that would cause this to be an issue? Has anyone already merged this asset or a similar one to Airi and would just be willing to send it to me to save me the hassle? Would anyone be willing to quickly do it if they know better?

Any and all help is appreciated! I understand that adding something like this is not technically necessary but I would enjoy having it and I'm sure others would enjoy seeing it.

I am more than happy to get an asset or something for someone who's willing to assist me in this endeavor!
Thank you for your time reading this post even if you are unable to help

[bdawg]

^ Bump

[bdawg]

^bump

[kh4m4ri]

My guess is you haven't enabled "Legacy Blendshape Normals" for your fbx in unity. Give this a shot and let me know how this goes!

[bdawg]

@kh4m4ri
You are an absolute angel, I do believe that is what the problem was ! It looks fine now that I have ticked that box Thank you so much for your help!