1. The slider switches from IK to FK. But you wouldn’t use it as a slider, you would snap over 1 frame.
2. Yep, just match it with my eye. But I try to avoid switching as much as possible. EG – If the arms don’t need IK in a shot, I try to keep it in FK for the entire shot. If it does need IK, then I do the entire shot in IK. (whenever possible)
Usually the legs can stay IK unless you try to do some type of Ballet dance or something 😉
3. Lazy rigging – sorry.
4. That is correct. But the confusing thing is that there is kind of 3 spaces on those FK bones. They have IK, where they follow along with the IK (but you will still be able to rotate the knee), They have FK to the hips, if the hips move the thigh moves. And then they have FK to the Root (they are isolated).
The isolated version can be tricky because you need to find the correct starting direction. Say if the character is facing forward and you switch to isolated FK – this will probably look pretty fine. However, if the character turns 90 degrees and you switch, the isolated FK will twist back to their starting point, which will be facing forward and the body will be rotated 90 degrees.
I hope that makes sense.
5. Don’t forget, you are awesome.
