Maybe 6dof means the swinging of the arms in the front and back view. The other three animations the arms are clearly swinging front to back but on the front and rear views the arms have an up and down swing. Maybe if at the end of each swing the hand is raised by a few pixels it would read as depth better. So that one is higher than the other.
*lovely sprites, especially the other chainsaw one
That's nice ;p i think the frame when the character is standing last a bit too long and breaks a bit the rythm, though your animation works well anyway ^^
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