Sim Creation

1691e80d8c4ca9d2​  What I meant was, is this the kind of thing you're looking for?

https://www.thesims3.com/assetDetail.html?assetId=9491202

Or do you want multiple pictures to scroll through, like this?

https://www.thesims3.com/assetDetail.html?assetId=9667733

For the first one, I used MS Paint to stitch together a bunch of different cropped screenshots from CAS, then used this tool:

https://www.zindasgoldensims.com/

to replace the default image with the one I made.  (I used it for the second upload too, actually.)  It's safe and simple to use; the only caveat is that the images should be square to avoid stretching.

If you're looking to have several images, like the second upload, then all I can think of is that maybe a CAS template sim has more than one.  The one-sim household I created did not.