Full Body Tracking Issues and Feedback

[ProbablePrime]

Hey Everyone,

I own FBT but dont use it often thought i'd try it out.

• I can't seem to be the right height. My feet always clip into this cyan plate. I've tried adjusting height compensation but it seems like the ratio between my hips, feet and head is wrong. The Calibrate trackers manequin has to have bent knees otherwise my head or feet dont end up in the right positions. This often leads to my feet ending up inside the floor.
• The cyan plate should have an option to make it ungrabbable moving it around whilst trying to grab adjustment points is irritating
• Knee offsets are hard to control, try setting the knee offsets and then either rotating the FBT platform or your own avatar with the joystick, They seem to be dependant on the rotation which can lead to some odd issues. -When rotating the platform the cyan avatar outline reacts differently to the superimposed avatar leading to inconsistencies with tracking. It looks like the IK is still trying to plant the feet separately of the FBT.
  • Here's a video on that: https://youtu.be/FEOSShU7lOI
• Knee offsets will randomly stop functioning and then only start functioning again after additional calibration:

Possible Enhancements:

• More symmetry options, knee offsets and avatar calibration adjustment page does not have symetry
• Some way to correct foot roll, Sometimes when manuvering the foot i will accidentally roll the adjustment point, this leads to club feet

Accessibility Concerns (Lower Priority)

• There is not enough contrast in terms of color between the cyan plate and my feet.
• During the avatar calibration step, there is not enough contrast in terms of color with the grabbable parts(spheres) and the rest of the skeleton.
• The red color on the FBT calibration window is too hard to read. It fails all known accessibility guidelines see(https://webaim.org/resources/contrastchecker/?fcolor=CC675D&bcolor=888461)

[Casuallynoted]

Thought I’d add some reports to this as well! I know I likely haven’t phrased any of these especially well so I’m always down to hop in and replicate them!

General Stuff:

• I’ve noticed that sometimes when grabbing the waist during the initial part (blue avatar) phase of setup, the hand will fly away into the distance while holding onto the waist. This makes it almost impossible to readjust if let go as the hands/lasers are no longer in player space. Usually I’ll fix this by temporarily turning off the waist tracker and fiddling with the full body menu until it resets the FBT calibration entirely.
• When I set my height to 5’7” (my irl height) and run the FBT calibrator, the blue avatar is bending quite a bit. Setting the height lower seems to produce a stance more accurate to mine, is this a bug? If intended behavior it may be worth adding some text to make players aware and have them set lower height values.

Avatar Specific Stuff:

• I’ve noticed some specific avatars bend the knees in the opposite direction. The Link avatar in Jazneo’s Outset Island world does this.
• I’ve noticed that when I make my avatar smaller, the waist/upper leg area seems to collapse in on itself. This seems to happen only in some of the more recent builds and stays until I reopen the FBT avatar calibration menu.
• I’m able to see my avatar’s head when I look down in full body. Been fiddling with the settings but can’t seem to find any that prevent this, may have to do with my avatars proportions but not sure!

_{Sent with GitHawk}

[Frooxius]

Thanks for the notes! I haven't been able to continue work on full body in past two weeks because I was away, but now I can have a look at those (some of these I planned addressing anyway).

But I need more information for a few of these too:

1) Not being able to set the height - the height compensation seems really high in the screenshot (1.07), have you tried it with 1.0? Is your floor calibrated correctly? Are you using any playspace modifying software or anything like that?

2) With the knee offsets, is this happening with all the avatars? It seems like something isn't getting transformed into the right coordinate space, but I've never seen any of this behavior on the avatar.

But the video you show on the video is problem with using the offsets in the IK - it's not supposed to work that way at all, so as a consequence the calibration doesn't work properly either.

The other point with randomly stopped functioning seems to be the same issue. Can you give me which avatars you experienced this with?

@Casuallynoted Do you have a screenshot of the waist/upper leg area collapsing on itself? What exactly do you mean by making your avatar smaller? As in smaller height compensation? Or scaling yourself down? Or something else?

Also you should always set your height to your actual IRL height. If it's slouching, then you can use the height compensation for fine adjustment.

[Casuallynoted]

In this case it happens when I scale myself down!

[ProbablePrime]

1. I'll re-calibrate my floor
2. This happened with The Neos Humanoid(its in neos essentials), A fixed Nanachi(Will send you the model), the one in the world is incompatible with FBT, This also happened with my usual spooky avatar.

"But the video you show on the video is problem with using the offsets in the IK - it's not supposed to work that way at all, so as a consequence the calibration doesn't work properly either."

I'm not sure i follow am I doing something wrong or is Neos?, if i setup my avatar facing 0 degrees in the world and then rotate myself the knee offsets dont seem to update leading to the above picture. I'll make a slightly more detailed video. Thank you for responding :)

[Frooxius]

Ok thanks!

It's Neos, you're not doing anything wrong. I'm just saying that the knee offsets being hard to control is just a consequence of the other bug you mentioned, which makes them work incorrectly.

[Frooxius]

Hello! Can you please check if the knee issue is fixed now? I've done some testing after the fixes and I haven't been able to replicate the issue.

If you still encounter it, can you please go to the VRIK and check the "DebugVisuals" on it? Then take a few screenshots (or ideally a video from different angles and with movement), that will help me a lot.

[ProbablePrime]

I will take a look as soon as I can, tagging @Casuallynoted to also report.

Thank you!

[sirkitree]

@ProbablePrime and @Casuallynoted - can this one be closed out now?

[ProbablePrime]

I have some additional feedback that's recorded somewhere about the recent updates but I need to get some more. Its still valid feedback so i would likely re-open with additional feedback if this were to be closed.

[TehTurk]

Wanted to add on this so it isn't lost in the myriad of Discord feedback channel,

An option to manually set trackers? Some of us with non conventional setups, or attachments/positions want certain parts tracked, but will automatically detect stuff like knees or other parts of the body before more mandatory ones. That or if people want peripherals in the future.

Along with a Diag for USB Bandwidth possible? Sometimes fullbody desync, (Like hands and head not matching etc) or tracking desync can be majorly caused by that.

Also, maybe some sort of button to reset the origin of the tpose reference(That you can see not on the platform) so it can sync up? You don't usually realize there is a giant fullbody reference near you when Tposing, so looking at the little mini you can be somewhat distracting and you try to Tpose according to that.

[Bellimora]

The hips are getting too high when you do a T Pose calibration. (I'm using the vive puck setup one on waist 2 on feet.

I was hoping the steam screenshot function would be a good off-the-cuff method of getting some shots of this, but I may ahve to use the camera next time. As you can see however, this was a fresh t-pose calibration. The hips end up high which presses the torso into my neck. The torso responds by forcing me into this hunched pose which makes it difficulty to make my avatars stand straight without a lot of finaggling.

One thing that is rather noteworthy here is the feet. The skeleton there is standing on tiptoes.

When I pull the hips down, everything lines up right. Moving at that point seems more or less alright.

Your hips are coming out high. Though there is no one-size-fits all with hip height. Leg to body ratio is a thing, google it up and see for yourself. It might warrant a LBR slider.