Converting a SFM model to ValveBiped for playermodel

[ChaosNarwhal]

So I have an issue, I have been trying to learn rigging and such to make playermodels. I got fed up seeing all the halo reach female models absolutely busted and just rigged so poorly that I thought maybe I could give it a try

This is what I see in blender, it should be correctly to the "valve biped" all the bones are in order and in pose mode the weights seem fine. I know the physics are a bit off but bare with me. Its my first time trying to do this

https://files.facepunch.com/forum/upload/264160/36a432bc-e4d9-4a26-bbb0-a6364b89dd1e/image.png

Everything looks fine here.

But when I open the game or a model viewer and apply it as my model this is what I get.

https://files.facepunch.com/forum/upload/264160/2bdbdf4f-9ebb-411a-b8de-3e86d635a9be/image.png

Maybe im making a super noob mistake, maybe I did it all wrong. But does anyone know what is going on here? any help is appreciated at this point and I just want a working nice looking reach female playermodel to further apply armor too.

[ChaosNarwhal]

No one know how to fix this so far?

[Grodbert]

Well, it is from SFM so it's not animated, maybe it needs proportions, I doubt halo's skeleton is exactly the same as valve's.