This turned out to be another rabbit hole, requiring cleanup of multiple levels of subtle calculation bugs in clipping and applying lighting at the room boundary.
There were more issues than just this once, it turns out.
PR
Weapon rendering at the room edge now looks perfect to me. I'll provide an analogous PR for 5.1.1 after this one is approved and merged.
____________________________
Gandalf? Yes... That's what they used to call me.
Gandalf the Grey. That was my name.
I am Gandalf the White.
And I come back to you now at the turn of the tide.
[Last edited by mrimer at 11-17-2020 09:08 AM]