Hi, I finally got around to trying the new algorithm that "fixed" the delta DE method out on a DE style method for solid on orbit trapping, 1st results:

<a href="http://www.youtube.com/v/KI-beZSZDIE&rel=1" target="_blank">http://www.youtube.com/v/KI-beZSZDIE&rel=1</a>

Note that the render time was just under 1 minute per frame @640*480 which I'm rather pleased with given the difficulty of getting the thin bits rendered accurately. The max iterations used for the above animation was just 8 and "solid" is based solely on the point trap distances.