UE5.7 VRM CHARACTER ANIMATIONS NOT WORKING PROPERLY

[azify-revive]

UE5.7 VRM CHARACTER ANIMATIONS NOT WORKING PROPERLY(WITH THE DEFAULT SETTINGS)(dx11-sm5)

WITH THE LATEST AVAILABLE VERSION OF VRM4U I WAS SEEING SOME PROBLEM IN THE CHARACTER...

What I Did:

1. I RETARGETED DEFAULT UNARMED MANNY ANIMATIONS WITH THE RETARGETER GIVEN IN MY VRM FILES...
2. JUMP, JOG, WALK ANIMATIONS WEREN'T WORKING PROPERLY(HAD PROBLEM IN SOMEWHAT LEG BONES)
3. I TRIED IN DIFFERENT VROID CHARACTERS AND THE PROBLEM REPEATED EVERYTIME...
   PLS SEE THE files i have added AND FIX THIS PROBLEM...

[makemefeelgr8]

Yup. Can confirm it's broken.

[azify-revive]

Yup. Can confirm it's broken.

Did U Find A Fix?

[makemefeelgr8]

Did U Find A Fix?

No, did you?

[azify-revive]

Did U Find A Fix?

No, did you?

Nah I just deleted ue 5 and all that 💩

[Lotusprincess69]

So i'm a total noob, but im doing my best to figure it out lol, i got a lot of places trying to mess with IK goals in the retargeter to make it kind of work. Seems the retargeter is just broken in 5.7, the Ik looks like its goin all over the place, so im gonna try learning all that. BUT, for now there is a roundabout way, you can make a 5.6 project, and import the vrm using that version, as it seems to work just fine. Then, you can just migrate the asset into your 5.7 project and you're good. I just figured that out and it works for me.

[azify-revive]

So i'm a total noob, but im doing my best to figure it out lol, i got a lot of places trying to mess with IK goals in the retargeter to make it kind of work. Seems the retargeter is just broken in 5.7, the Ik looks like its goin all over the place, so im gonna try learning all that. BUT, for now there is a roundabout way, you can make a 5.6 project, and import the vrm using that version, as it seems to work just fine. Then, you can just migrate the asset into your 5.7 project and you're good. I just figured that out and it works for me.

u know how much of my time and disk will go in ue5.6 to install and 5.7 (moreover 64 gb of ram costs more than a 5070 now, so no chance to go with ue now)

[Lotusprincess69]

Okay I think I found a better solution. Go into the IK rig the retargeter uses, should be IK_(model name)_Mannequin. On the left, under the solver stack docker, add a new full body IK solver, add the root bone (which should be your hips), then add the goals (the individual bone goals, not the "full body IK" goals), then uncheck or delete the original. That fixed it for me.
The only issue I've run into so far after that is the landing animation, which you can fix by going into your generated animation blueprint, opening the anim graph, main states, land, then opening the sequence player for that animation, and setting the additive anim type to local space.
Guess it really is just the IK itself being broke in 5.7 and just needs to be redone, which is weird as even the IK I imported from 5.6 that did work in 5.6 does not work with all the same migrated assets (including all the 5.6 third person assets) in 5.7.

[makemefeelgr8]

@Lotusprincess69 I love you so much! Thanks for the workaround! Could you please share some screenshots as well?

[Grimm0351]

Can confirm, I am having the same issue. Will reply again if I find a fix.

[ruyo]

Hi.
As far as I've tested, no particular issues have arisen.
If possible, please share the VRM model experiencing the problem.
Also, some bug fixes have been implemented in UE5.7.1. If your engine is outdated, please update before trying again.

[Grimm0351]

Hi. As far as I've tested, no particular issues have arisen. If possible, please share the VRM model experiencing the problem. Also, some bug fixes have been implemented in UE5.7.1. If your engine is outdated, please update before trying again.

It happens consistently across the 6 VRMs I've tested so far (from different artists), however in relation to specifically the UE third person unarmed anim bp, it seems most pronounced in the Jog forward, Jog forward left, Jog forward right, and jumping animations that are affected, which initially led me to believe everything was working fine. As 5.7.1 is the first time I'm using Vroid or VRM4U, I have no frame of reference for comparison to other versions.

[makemefeelgr8]

please share the VRM model experiencing the problem

@ruyo Sure, I'll send you some files on Xwitter.

[Grimm0351]

Okay I think I found a better solution. Go into the IK rig the retargeter uses, should be IK_(model name)_Mannequin. On the left, under the solver stack docker, add a new full body IK solver, add the root bone (which should be your hips), then add the goals (the individual bone goals, not the "full body IK" goals), then uncheck or delete the original. That fixed it for me. The only issue I've run into so far after that is the landing animation, which you can fix by going into your generated animation blueprint, opening the anim graph, main states, land, then opening the sequence player for that animation, and setting the additive anim type to local space. Guess it really is just the IK itself being broke in 5.7 and just needs to be redone, which is weird as even the IK I imported from 5.6 that did work in 5.6 does not work with all the same migrated assets (including all the 5.6 third person assets) in 5.7.

So the fix I found was to go into the IK_(modelname)Mannequin, as you said, and just delete the IK goals for the Left and Right toebases. Then, add new goals to Left and Right feet instead. Save, run the Retargeter (RTG(Modelname)) as normal, and fix the land animation as you already described.

As you can see, the goals are now at J_Bip_R_Foot_Goal, and J_Bip_L_Foot_Goal, and the End Bones are now J_Bip_R_Foot, and J_Bip_L_Foot, respectively. I included the hand goals in my screenshot just to assist those needing help on where to find what needs changing.

Additionally, I went back and tried @Lotusprincess69 fix again, and verified it indeed works. I believe their fix to be the superior method as it retains the toebase as the goal rather than just the foot, which I haven't found any issues with thus far but might cause some down the line, I'm not sure.

TLDR, their fix is superior and works.

[ruyo]

Thanks for the report!
The IKRig settings for the mannequin appear to vary depending on the UE version and sample.
Automatic detection is difficult, so please adjust them manually.

[makemefeelgr8]

@ruyo
Yeah, it does look like they re-rigged the IK rig. Any hopes for a fix? Something quick and dirty, like a checkbox to apply this workaround?