Items on item belt are always rendered top->bottom/left->right

[theMightyMan]

As shown in the attachment items on a belt are always rendered the same way independent of the belt direction.
This leads to cases shown in the attachment where in corners some items are almost hidden/shown 100% depending on corner direction.
Rendering should happen in order depending on belt direction. In real life items don't flip top/bottom in a corner, and if there are a lot of corners it causes some kind of flickering (switching top/bottom).