[Feedback/Feature Request] Allow strength control of the elbow-clipping avoidance feature or reduce strength altogether.
AcChosen
[Image examples will be added in a future reply] While the elbow avoidance feature is great, on some avatars, it can sometimes be too much to the point where the elbows will start to point outward at any position or rotation the hands/controllers are in, resulting in a kind of "chicken dance" pose when the hands are rested at their side near the chest.
In the old IK system, wrist rotation had almost direct influence on the position of the elbows relative to the hands actual position. This wrist rotation influence seems to have been reduced drastically in order to prevent elbows from clipping into the chest area. While achieving its goal, it creates an issue where the user seems to have zero control over where their elbows are going without elbow trackers. This is especially apparent when a user lays down on their side with their hands resting near the head or chest, resulting in the elbows bending upwards unnaturally and hanging into the air.
Another instance would be when a user is laying down on their front side with their hands out to the sides pushing on to the ground, as if doing a "push-up". The elbows would unnaturally bend outwards, perpendicular to the body, where wrist rotation would not influence where the elbows would move, even if in reality certain wrist angles would make some of these poses possible.
For elbow IK, A hybrid of the legacy system and the beta system could prove useful, especially with avatars of different proportions. Some characters chests/arms are so small it was impossible to have elbows clip through the chest, while other avatars had very long arms or wide chests and still clip even with the current changes. Having no control over the elbow movement without elbow trackers makes it difficult for those who are in strangely ill fitted proportioned avatars to pose naturally. As stated before, the legacy system allowed for quite a bit of influence of wrist rotation to influence elbow positioning, which could be used to mitigate these problems. This no longer possible with the little amount of influence now that wrist rotation has. Combining the two systems, either through a slider or hardcoded numbers, could give the best of both worlds and allow users to make adjustments if needed based on an avatar they choose. Elbow IK is extremely important for 3-point/4-point tracking, 6-point tracking, and 8-point tracking (knee), and that little bit of wrist influence will help users be able to pose more naturally with all avatars, even ones that aren't specifically fitted to them.
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xantoz・ザントス
I do miss the ability to position elbows with wrist rotation when in 6 point tracking or below.
AcChosen
As I stated in my oldest comment, these pictures aren't very scientific and are a bit biased. I can confirm, however, that my avatar arms are the same length as my real life ones while dialing in my true real life height. I also did not change my height settings between the two systems either nor my playspace while taking these pictures. I tried my best to recreate each pose fairly while switching between the IK systems (having the toggle to switch between the systems was a massive help and made these comparisons much easier to spot. Thank you to whoever implemented that!)
These issues also occur while using 3-point tracking though not as aggressively.
AcChosen
Pose 4:
Laying down on stomach while lifting head and chest up with arms out in front. (Legacy pictured first)
This shows something similar to the aggressiveness of pose 3. Wrist rotation has no influence on where the elbow goes in this pose, thus the user's elbows are always stuck in these poses.
(Unrelated, but you can also notice where the issue of people's feet going into the ground from this pose, as my playspace or my height settings never changed, yet, I am significantly lower to the ground in the beta.)
AcChosen
Pose 3:
Laying down on the side with hands on the ground in front. (Legacy pictured 1st)
This pose is the most glaring one. before the wrist rotation allowed you to position the elbow in a more relaxed pose, but now the avoidance system is acting very aggressive and forcing the elbow away from the body in a very unnatural way, and no matter of wrist movement can change this position. I can see this being a concern for users that like to relax or sleep on their side.
AcChosen
Pose 2:
Roughly the same as pose one, but the aggressiveness of the avoidance system seems to be reduced as you move lower down the chest.
AcChosen
Going to be adding some pictures as examples. This isn't the most scientific evidence, but it at least paints a picture of the concerns I am referring to. Wrist rotation is important here, so iII tried to do all the poses as best I could, making sure to emphasize the rotation of the hands.
Pose 1:
Elbows near the upper chest.
In the legacy system (pictured first), my wrist rotation pulled the elbows closer to my chest, in the current system, they pull further away, even though they are in roughly the same position. The pulling away from the chest bit is definitely intended behaviour from the avoidance system, however, I can easily see a future where this system will work against users trying to reach certain poses they've been able to before.
