slight feet and hand movement during idle

I use blender to export a model (FBX 7.4 Binary exporter), and export the animations seperately (same exporter)

everything is fine save for one thing: during an aide animation, where the character just stands breathing and nothing else, both the hands and the feet still move slightly, despite having the root transformations of the animation baked into 'original' on all settings.
The movement is very slight, but just there enough to be noticable during gameplay.

I use IK, and have IK keyed on at the start and end frame of the animation, on both feet and hands.

 

Do you have any extra joints in the rig? For instance twist joints in the thighs and calves? If you do and you are using the humanoid rig then unity may not be calculating them. You have to create an avatar mask that includes those joints.

 

nope, we're using a rig specifically to work well with the humanoid function in Unity, and all joints are assigned properly.

 

In the inspector for the animation asset go to rig>configure>muscles and settings, at the bottom of that menu under additional settings is a check box with Translation DoF. Click that on and see if it improves.

 

No difference...

 

You might want to check if the compression settings for the animation are causing the issue. In some situations, this can cause inaccuracies in the animation compared to the original and may need to be tweaked abit. Take a look at the documentation here and see if that helps: http://docs.unity3d.com/Manual/FBXImporter-Animations.html

 

Are you importing the rig with the IK system intact? Or are you baking out the animations and just importing the skeleton with rotations?

 

I was baking the animations

Thanks for the tip. Adjusting the compression in unity didn't do enough (altough turning it off did help a bit!), but in combination to some adjustments to the blender exporter settings managed to minimise the problem to a point where it's unnoticable in the game. It's still there when you look closely, so the problem isn't completely solved, but the game never gets that close to a character, so it works well enough

thank you both very much for your help~

 

I realize that I'm 6 years too late, but in case anyone stumbles upon the same problem. This is caused when exporting from blender. When exporting, go down to "Bake Animation" and set "Simplify" down to a lower number. Something like 0.1 works. Then in unity, when changing rig to Humanoid, go to the Animation tab and set Anim. compression to "off".

Keep in mind that setting the simplify lower will increase exporting time.