I know, I KNOW; I’m a rotten noobtard; sue me.
Does anyone know why some of my CAS thumnails are veering off-center?

Meanwhile in S3PE it looks like this:

And yes, it’s a 256×256 png.

That accessory was cloned from the base game pearl earrings, btw. The female ones. If it matters.
Thanks to @aikea-guinea for showing me how to fix the thumbnail! ❤
SHOES?
Also, why aren’t my shoes getting working thumbnails? It doesn’t work with the 0x00000001 Group ID (all the CC shoes I’ve looked at with working thumbs use 0x00000001). And it doesn’t work with the original 0x00000000 ID either. Maybe I should use 0x00000003/4/5/etc? I always clone the same base game Athletic boots, btw, not EP shoes.
Got the shoe thumb working with the 0x00000001 ID, thank goodness.
EP ACCESSORIES?
And speaking of EP clones; what’s the deal with switching out the thumbnail files in the CASThumbnail package? I’m confused. 😛 I deleted the CASThumbnail file and it didn’t get me anywhere.
Can’t I just use the 0x70000001 ID instead?
[EDIT] YES! O_O
For instance: my base game accessories come with the 0x00000000 Group ID, and when I use a 0x00000001 ID on them, the thumbs work. (Praise the llamas.)

The Supernatural EP accessories come with the 0x70000000 Group ID. I’m gonna try using the 0x70000001 ID on them and see where that gets me.
[EDIT] SUCCESS! ^0^

*sighs*
This is my life. Mama had such high hopes for me. Yet here I stand. U_U