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I've constructed a different setup that emulates how hair work ... Still don't know why you want to use the Spline Wrap... I didn't. make splines act like hair.c4d There are some bugs I'd like to address to @Cerbera The Field Driver Tag does not work with Node Capsules (I tried connecting the Field with the Line object... it refused to add any parameters) There is no Delete Parameter in the Field Driver (not a bug, but definitely needed) You will notice that once the playback is on, the Line Length cannot be influenced by the Field anymore.

Thank you for the Loop Carried Value suggestion! That was the main issue. I misinterpreted that for loop. Since it uses values that were modified in the previous iteration Loop Carried Value was necessary. Another thing I had to do is do an Inverse Matrix on that matrix. Either that or reverse the order of the cross product to generate the bitagent. I'm not sure if this is because I messed up something else somewhere or C4D and Houdini store matrices differently. But in the end it works just like in the tutorial. The spline distribution doesn't work quite the same. It has issues at changes of orientation along the curve while this doesn't.