Y-Phil posted at 1:18 AM Tue, 17 October 2023 - #4476379

hornet3d posted at 12:10 AM Tue, 17 October 2023 - #4476378

Y-Phil posted at 4:06 PM Mon, 16 October 2023 - #4476360

I don't know it that's the case or not for your character, but I've seen that effect, from time to time, when some parts of the topology were too near, for example between the breasts when they're too near, but: it appeared only once, on one character.
It that concerns different parts of the body, you may try different scatter group IDs,

The whole issue started way back when Sub Surface Scattering was first introduced and the lines were noticed on adjacent groups such as arm and hands or shoulder and body and the recognised solution was to make sure adjacent group were in different scatter groups.   As I have been using my character for sometime, to tell stories, my character follows that convention and has not shown the lines for a long period of time, at least up until the latest issue of Poser 13 when they reappeared.  I tried using Unimesh as a skinning method but the lines remained then, in sort of poke and hope testing technique, I changed all the scatter groups to the same group and the line disappeared.

As I have a solution it is not really and issue for me and all I have to remember is to do the change if I return to an older scene to do an update.  The reason I started the Thread was two fold, first to highlight the problem in case anyone was seeing the issue and had not found the fix and secondly, as a matter of interest, to see if anyone knew why the issue had re-appeared in the latest release.  As I have a simple solution and no one seems to have the same issue I really don't see it worth making an bug report, particularly when I have a suspicion, based on my years spent as a field trial manager testing software releases, that the whole situation may well appear in a future release.  

Now that you're saying that, I've remarked some subtle differences in my way of using the PrincipledBSD node, in particular the Legacy Scatter checkmark and the SSS Method parameter, but as I haven't run any specific test, I can't be sure if it's related or not.

That is part of the point really, changes could be made that work quite happily if you are building a figure/scene from scratch but there may be an issue when using figures that have an existing SSS setup from an early version of Poser.  That is the cost of change and progress I suppose but for story tellers that want consistency throughout a story the need to be able to use  existing figures is important.  It is one of the reasons I do not immediately jump to a new figure when it is released as i have to go back and recreate existing scenes with the new figure.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.