From LightWiki

First enable the experimental features in LW (ctrl+shift+f1)

Then bring up the experimental IK options (ctrl+alt+f3)

The options are: Max Min Step Factor Iterations

I've found that I can double my FPS in layout by changing the values to:

Max: 0.5 Min: 0.002 Step Factor: .3 Iterations: 200

With almost no accuracy loss in the IK solution.

Some values can go to much higher or lower with more speed increase, but will affect different numbers of chains/characters differently. Whats acceptable for 1 setup might not work well for another.

Author: Michael Blackbourn