Okay, it’s probably out there somewhere, and not considered custom in a way. Robin explained to me the the latest version of Eclipse Origins needs default sprite sheets (individual files of course) that have 16 tiles, not just 12. When you’re dealing with a sprite that looks like this:

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. . . .
. . . .
. . . .

```As you can see clearly, there's 4 rows of 4 tiles, which makes 16 when added up. All the sprite converters that convert the above template to this:

. . . . . . . . . . . .


EDIT: Robin hasn't released the version that will be required to have these sprites yet.