Would you mind sharing the a-chaos externals you have been able to port, Volker?
I'm specially interested in the Hénon-Heiles attractor, which I've already started recoding from Sier's source code
There are problems in implementing a strange attractor with objects in a patcher. I have tried a lot before. You can solve iteration at the cost of speed and precision,
I'll see what I have over the weekend.
As far as I remember the implementation of henon-heiles is buggy in the a-chaos lib. By the way, all objects of the original lib will work if you put max in 32bit mode.
Since max uses 64-bit floats, precision is not an issue anymore ...