I gave up on the hair model Wild Hair. I could not get rid of jitter. To prove it was just the model and not the plugin or "me," I acquired Becca Hair, with which Biscuits has made a fine video. This worked instantly.

I am thrilled over the end of the nightmare of the Poser hair/cloth room and it's collision failures. Adios.

Here's the video:

Click for V4 with Becca Hair