alteredq/three.js — comment on commit 91376253d3a5d93034a35aa4dd69da351337611a
File:  line 0
By oosmoxiecode:

I don´t think there were any blending going on in the original Q2, so maybe they are bad examples to use.
I think the first version of the md3 format, that came after, had like head, torso, legs split up so they could be animated independently(running, shooting etc.).
It looks like for example ogre(http://www.ogre3d.org/docs/manual/manual_78.html) have split it up into "morph animation" and "pose animation", where only the later one supports blending. There´s probably a good reason for that.

Maybe blending is more meant/used for skeletal animations? Sounded like a nice thing to have in theory at least. :)

But I do remember away3d(flash) had some feature like that. Found this post with an example: http://www.closier.nl/blog/?p=83