In one of the FFF-387 videos I noticed a vertical cut in both the copper plate and plastic/steel belts and it turns out this is an inserter hand shadow. There seems to be about a 30-degree angle between the shadow and the line of the jaws; this isn't necessarily wrong but I though I'd look a bit deeper.
- foundry-vcut.png (88.28 KiB) Viewed 586 times
So here are some disembodied stack inserters moving items from an invisible belt to an invisible chest in the middle. The hand shadow on the right looks the most suspect as at one point it reaches a perpendicular angle with the hand itself. The top one doesn't look entirely right either.
Normal inserters don't look as bad:
Here's a pic of a bit of rotated inserter hand shadow poking out in a vanilla / unmodifed game - in practice the held item will obscure most of the supposed badness.
- perpendicular-shadow.png (84.57 KiB) Viewed 586 times
Expected result: difficult to say, but do the hand shadows look the way they're meant to look?