Comments on: IK or FK?

By: Miwigziumikof

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By: Charpu

Charpu — Sun, 05 Apr 2009 18:33:36 +0000

Hello guys,

I use Ik almost all the time.. I guess im just used to it.. but the reason why I like it is because in my head when I move my hand around I dont think about the rotations my arms have to do , I just translate my hand to the point I want it to be… so I do the same in animation, but it obiously needs a little more work sometimes to not make it look “IK” like you said.

Nice post!

By: Maulik

Maulik — Sun, 15 Mar 2009 23:35:45 +0000

How about not thinking in terms of IK or FK? Have both together in one solution? Something like CharacterStudio Biped has, but more generalized solution.

By: Robin Mitra

Robin Mitra — Sun, 08 Mar 2009 11:31:34 +0000

Thanks for the article..I am a noob character animator. Can someone tell me or guide me to an article or something on how do I go about using the arm alignment/space switching thing in 3dsmax? I have no idea how to go about using it but it seems like a really handy thing…

By: Graham

Graham — Thu, 22 Jan 2009 03:50:38 +0000

I’m pretty much strictly FK unless a character is touching a table or something. However, just recently I’ve had to do a shot where the character is kneading his hands together. IK seems to be working better for me in this case. I’m just starting to polish it up so it remains to be seen if it becomes a hassle

By: Theresa Adolph

Theresa Adolph — Wed, 21 Jan 2009 06:43:08 +0000

Oh and Dr. Gordon –
Don’t remove this post. As animators we are never done learning. Same goes for the aspiring animators, like myself.

By: Theresa Adolph

Theresa Adolph — Wed, 21 Jan 2009 06:38:10 +0000

I’ve done some tests using both just to find out what I prefer. I agree that it all depends on the shot. Most the time I have found FK does the trick. I just recently discovered how helpful the align tool can be on the arms on this shot I’m working on of a guy sitting down in beach chair. I was having trouble positioning his root and getting the arms just right. By simply turning align on all my problems were taken care of.

I guess you just have to mess up a lot of shots until you discover for yourself a method that works the best.

Great topic.

By: Dave

Dave — Wed, 14 Jan 2009 12:38:24 +0000

I used to only use I.K., but then slowly started to experiment switching between I.K. and F.K, and now I wouldn’t do it any other way. As long as your able to make the smooth transitions between the 2 it really makes things a whole lot simpler. I do the same thing, use IK if my hand is planted on something, and FK for everything else.

As far as this being the 2nd time you’ve posted this, no worries, its good for the new readers. Plus review is never a bad thing for the rest of us. Keep it up!

By: Jean

Jean — Tue, 13 Jan 2009 14:50:41 +0000

I’ve recently begun experimenting with doing more work in IK. It does have the advantage of tighter control on the arcs, however I still find FK to be more intuitive for drag and overlap.

By: Dan Scott

Dan Scott — Mon, 12 Jan 2009 17:54:11 +0000

Interesting that a lot of people work the same as I do. I mainly use FK versus IK. Good topic Mr. Gordon. Keep the incite coming.