People are fully visible behind small trees

[samoen]

When a party member is behind a 'tree_small' feature, their sprite is layered fully on top of the tree sprite, instead of fading one of the sprites, which happens for larger sizes of tree.

[Grokmoo]

I think the Point Ord refactor in bea874c probably broke this.

I forgot how this works. The issue is that those are static sprites rendered in a different layer than the actors. And, they can be either underneath or above the entities, depending on orientation. These trees really need to be broken into multiple pieces to fix this, just like the larger trees.