Copy and paste joint position to "absolute" world space position - frames nearby conform with optional smoothing
I don't know if it's an actual bug or not but one would think when you copy and paste key frames of joint positions that, if the keyframe along with joint position will fit, that iClone will paste a new absolute world space position of the body part.
I'm specifically using the Edit Motion Layer tool and find its very hard like a hit and miss that iClone will move the joints into correct position even when the body has a lot of flexibility. Perhaps it's contending with nearby frames but ideally the nearby frames within a span of time or frames should conform to it with smoothing.
Perhaps like a graphic clone brush it samples nearby keys but averages them.
So what I shared above could still help but I think I discovered what the glitch was from.
I had a regular clip and mocap clip and I was working on combining the two.
There was a bit of an offset of the character between the clips so I used the align tool with limited insight to which body part or the root to align to. When taking feet position from the mocap clip and pasting it to the other clip I think there was tension on the bones.
So what I did was copy and paste the mocap clip, make it completely blank and animate from scratch and then everything including reach effectors started working properly and had a smooth blend between the clips. Maybe there should be an "align to torso" for mocap data, aligning to root looked like it wouldn't have worked but I initially chose align to foot but in the end like I said I just duplicated the clip and erased the mocap from that and started animating fresh. The reach effectors would be ideal if they have a bypass frames function so they absolutely don't move.
I wish there was a workflow /tutorial for combining mocap with regular clips dealing with offsets, if there is could you direct me? I haven't seen one anywhere. Anyway it seems that aligning with the torso would allow copied frames of the torso mocap position and rotation and allow the feet position from the start or end of the mocap clip to work seamlessly.