What causes "Bent Leg" Syndrome?

Sometimes when I fly into a sim, I notice people who's avatars are larger than they intended, and their legs are bent. Also, attachments are misaligned. For instance, on furry avatars, you can often see the top or bottom of the human head ripping through the furry head.

The person who is malformed on my screen, however, sees themselves as normal. I've had this happen to me as well, and just today someone said I had the dreaded "Bent Leg" syndrome, but I didn't see it on my client.

Anyone know what causes this and how to correct it? I've only seen in on short avatars, too, if that makes an difference.

I think this is one of those annoyances that has been ongoingly tracked for a long time. Sometimes the checkbox of AVATAR VERTEX PROGRAM in the graphics prefs can have an effect on it, I think. On the other hand, there's been plenty of times where I collided with the side of a hill, and when I went to stand, one of my legs was out at an impossible angle.

It's caused by damped motion on an avatar (that is, llMoveToTarget in an attachment, or something similar), sitting on something, then standing back up usually fixes it.

-Adam

Ok, thanks, I'll give the sitting trick a shot =D

Why does it make your avatar look taller than it is, though?

I get this a lot. And no, sitting and standing doesnt fix it for me. Neither does teleporting out and back in. Only way I fixed it was through a relog, so I suspected a partial Ruthing.

Did you see the change on *your* client screen, or did other point it out to you?

I've seen this a lot since 1.7.1 came out, and it's getting really annoying!

Usually the situation is that I have just teleported to a new sim to do some shopping or exploring. I fly to a location and land. Suddenly I'm standing in a crouch like a Neanerthal with rickets! My knees are bent almost 90 degrees, the lower legs are splayed out to one side, and my feet are through the floor.

I have also had it happen when I have NOT teleported, but have been trying to sit on something and stand again. I stand up and suddenly I'm in a very awkward position, with my legs bent at wierd angles.

I tried the idea of sitting on something and standing again, and yes, that did fix it, at least temporarily.

Prior to teleporting to the new sim, my legs looked fine. I am not wearing any attachments that actively affect my movement. Mac OS 10.3.9, SL 1.7.1(2) on a Mac Mini that easily meets the minimum hardware specs.

I recently did a completely clean re-install of SL - wiped the program and all prefs off the disk and started from scratch. It didn't help this bug.

My response probably falls equally to yours but I have noticed this when people change avatar shapes and/or their shape change is considerable. Or maybe even the slightest change has this effect as well. Something like that...heh

I've never yet had this happen to me since I unclicked the Vertex Programs checkbox, which surprisingly to many people also raised my framerate considerably (~150-200% of previous) when I UNchecked it.

I get the feeling there's a bug in their vertex-shader code for creating the contortions of the base model somewhere that's hard to hit without 'impossible' value ranges leaking into the code somewhere, perhaps one that's implementation-specific.

Of those that have had the bug, video cards, folks?

ATI X200 on-motherboard chipset here.