Need advice on IKFK switch

[exsulator]

I`m new to rigging, but I followed a tutorial. Now I have a character with legs and a switch (an attribute) that can slide the weight between IK and FK control. Neat! And it works, or so I thought.

The rig breaks when I key the switch (to get a smood transition between IK and FK)

I made this Gif to illustrate the problem

As you can see in the gif, the switch works fine when manually scrubbing the attribute, but it breaks when the attribute is animated with keys.

This is all so strange to me, and I`m new to rigging. Any advice how to solve this?

(Setup: Switch attribute is connected to the "IK blend" of each IK handle. Each FK parent constraint node`s FK weight is connected to a reverse node, which in turn connects to the same Switch attribute.)

[mspeer]

Hi!

Please try switching Evaluation Mode ("Parallel" vs "DG") in Preferences.

[wynandlens]

Did that help?

[exsulator]

Ok, so the situation changed - turns out, that tutorial series had a great flaw in it, but it was not clearly warned. I got hold of the creator on discord, and he said to do the IKFK system over again, using a newer tutorial he had (rusher version).

I also found out what was causing the issues - the IK handles move with the IK controller, but when switching, they go to the FK controller. I`m not sure exactly how and why, but to test this, I zeroed out the handles, and that solved the issue for that single frame. But like I said: connections are doubled up and out of wack. The Rusher tutorial explains how to separate the connections to avoid such issues.

Sorry I never got around to test what you said.