Tomas Slancik

details() function has just 2 arguments as opposed to detail() so you may want to try
or if it's a detail attrib on input geo as in your case you can also do

a few additional notes:
- Polysplit expects single continuous chain of splits, so if your splits cannot be done as a continuous line it will also error out
- you may want to change your wrangle to run over Detail, then you can also just use
instead of setdetailattrib()
- and for readibility you may want to use space instead of a newline in your splits string

Nicolas Heluani
Basically another snag I got is that there is no global variable for current udim in Houdini (which I find crazy, definetely add one SIDEFX) so the <UDIM> does not get evaluated until the write step. This create an issue if you want to customize textures per UDIM.

have you tried @UDIM ?
typing `@UDIM`in your Font COP works for me
and to control which UDIM to display you can use Default UDIM parameter on the COPnet which is also accessible if you are inside on the top bar on network editor

Lightgodlike
Right now, if I apply the Car Rig to the truck, and following your instructions everything works fine — but the trailer ends up with no wheels.

not sure what you are referring to as "your instructions" but I assume it's the image with yellow descriptoions
which in general looks like a proper setup for this kind of sim

the immediate thing that comes to mind when you say that the wheels disappear may be that your trailer wheels have the same name as the wheels on the truck

in general it's a good idea to prefix everything to avoid potential name collisions to begin with
additionally make sure that your RBD Unpack has Enforce Unique Name Attribute... checked to resolve any outstanding name collisions