From ffc4b692f662b8f19f9f34968d4bf5ea585b06e8 Mon Sep 17 00:00:00 2001
From: LemonInTheDark <58055496+LemonInTheDark@users.noreply.github.com>
Date: Fri, 17 Jul 2026 03:47:05 -0700
Subject: [PATCH] Fixes weird banding on mineral turfs adjacent to space (on
 the bottom z level) (#96997)

## About The Pull Request

You need to block emissives for starlight to color you, and this turf
isn't well, doing that.

So we should do that.

This is hot code, which is why I have guard checks like I do. It's about
0.2-0.3 seconds of init on my machine, somewhere in there at least.

## Why It's Good For The Game

This bugs me a lot

## Changelog
:cl:
fix: Starlight will light rock walls adjacent to space... better.
/:cl:
---
 code/game/turfs/closed/minerals.dm | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/code/game/turfs/closed/minerals.dm b/code/game/turfs/closed/minerals.dm
index b16e8b45bdf..4421661118a 100644
--- a/code/game/turfs/closed/minerals.dm
+++ b/code/game/turfs/closed/minerals.dm
@@ -204,6 +204,17 @@
 	scan_state_overlay.pixel_y = 224
 	scan_overlay.add_overlay(scan_state_overlay)
 
+/turf/closed/mineral/set_smoothed_icon_state(new_junction)
+	var/old_junction = smoothing_junction
+	. = ..()
+	if(new_junction != ALL_SMOOTHING_JUNCTIONS || (!isnull(old_junction) && old_junction != new_junction))
+		update_appearance(UPDATE_OVERLAYS)
+
+/turf/closed/mineral/update_overlays()
+	. = ..()
+	if(smoothing_junction != ALL_SMOOTHING_JUNCTIONS)
+		. += fast_emissive_blocker(src)
+
 /turf/closed/mineral/get_smooth_underlay_icon(mutable_appearance/underlay_appearance, turf/asking_turf, adjacency_dir)
 	if(turf_type)
 		underlay_appearance.icon = initial(turf_type.icon)