eyebrow bones not working properly

[jawad]

I am using these bones to move the eyebrows. the bottom two bones are used to eyebrows separately .and the bone at the top used to move the bottom two bones to make the eye brows together.however even though they work properly in frame 0. the top bone doesnt work from frame 1 .
need help urgent.

[synthsin75]

Your image:


You probably want the "both" smart bone to move a parent bone for both brows, instead of trying to move the brow bones that are already controlled by their own smart bones.

[Greenlaw]

That's an interesting Smart Bones setup. I'm guessing this is what you expected...



Here's the project file for you to study...

Eyebrows_01.moho

This is a technique I like to call Daisy Chaining. I'm using the blue (Both) Smart Bone to operate the green (Left) and orange (Right) Smart Bones.

When you set this up yourself, you're going to find that the blue (Both) Smart Bone works fine on frame 0, but doesn't work on an animation frame because Moho will ignore the daisy chain when there are multiple bones involved. This is not a bug; Moho does this to optimize the UI's performance.

However, you can force Moho to respect the setup by targeting a dummy bone at the controlling Smart Bone. In this case, I have a bone called Activator (the small red bone) targeting the blue (Both) bone.

In very complex setups, I'm guessing this setup might impact performance, but I've never noticed a problem with it in my setups.

Hope this helps.

Tip: After setting this up, you should Shy the 'activator' bone. There is no reason to animate this bone, so you may as well 'hide' it. It's good practice to Shy any bones that are not meant to be keyframed on the Mainline, especially when that can break the intended operation of the rig.

(P.S., I talked about daisy chaining Smart Bones in a recent tutorial, but I can make a video specifically about this technique, with more information and tips.)