Whilst I was carrying out tests in a clients sim, wondering why our movie we made for them was streaming with a 60-75% load on the client, whereas in our sim it was only loading at our targeted loading 20%, I realised through the results that scultpies actually use UpdateImage and UpDateGeo pipelines in the client, even they don't 'move' they do constantly update themselves like a movie or texture swapping script. The clients sim had quite a selection of sculpties, which raised my curiousity and concerns.
As most of our movies are targetted at 25fps, I noticed the corolation between the movie frame rate and the sculpties frame rates being accumalitive, but as the sculpties seem to update at around 12 times a second, I remade a movie at 20fps and the Client loading dropped back to our targets of 20%, the same movie then played on our sim, showed between a 12.5-15% client loading. The difference in frames rates 'seem' to interpolate the frame rates as opposed to being accumalitive.
Sculpties also use quite large resources in the ImageGeo (Image Geometrics) range, possibly due the the alphas used in the bounding boxes? (Not my feild), it is the highest use of this resource I've ever seen at around 25-30%.
Each Client will probably read slightly different loadings due to system abilities, but as my system is in the high end in most areas, I can't imagine how this effects those on lower spec systems.
If you want to take a closer look at these loadings and effects on the Client, Ctrl+Shift+9 is a drill down menu section of each client resource, or Ctrl+Shift+2 for an overview.