In Setup mode, select the hand bone and hit the "+" button to create a new bone, position it in the first bone in the index finger. hit "+" a couple more times and finish the chain. Reposition the bones so they align with the finger correctly. Rename them to Index_A_L, Index_B_L and Index_C_L.

Turning on Limited Range for each of the finger bones will help make sure they only deform what they're supposed to.

Under the file tab use the clone button under Multiply items and copy the finger chain 3 times, then move those chains into position in the other fingers. Remember to rename them.

Toss in a couple bones for the thumb.

Under the file tab create a new Slider, call it Sliders_Fingers_L. Make it a child of the Wrist Null.

Go into setup mode and rename four of the slider bars to Index, Middle, Ring and Pinky and change their values to 0.25. Turn off the last 2.


Create a new command, enter the following:

PercentStep([Slider_Fingers_L:xpos], -.5, 1.5)

Then under the Variable menu add Index_A, Index_B and Index_C to the command, use whichever rotation value is needed to get the fingers to bend correctly (in my case it's heading).

Once this is done you should be able to move the slider and the finger will bend up when you move the slider towards the left, and will bend down when you move it towards the right.

Copy the command 3 times, switching the bones in the Variable menu and changing the slider variable in the command.

Index = PercentStep([Slider_Fingers_L:xpos], -.5, 1.5)
Middle = PercentStep([Slider_Fingers_L:ypos], -.5, 1.5)
Ring = PercentStep([Slider_Fingers_L:zpos], -.5, 1.5)
Pinky = PercentStep([Slider_Fingers_L:heading], -.5, 1.5)


 Hide the 2nd and 3rd bones of each finger, you wont be animating them because the sliders will handle that. Leave the first bone so you can spread fingers in and out.

Now go to the File tab, select the Shoulder bone and Mirror it. Also mirror UpVector Null and clone the Slider. Then go into the Command tab, copy the commands for the left arm. (If they're grouped under 1 command you can copy em all at once).

Now go through and rename all the new stuff with a R, then change the commands to reflect that.

Also: you'll need to change the PercentStep command values from -.5, 1.5 to .5, -1.5. for the right side.

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