diff --git a/data/core/images/terrain/cave/stone_walls/wall-stone-mine-convex-bl.png b/data/core/images/terrain/cave/stone_walls/wall-stone-mine-convex-bl.png
index 0fb1ec68dec3..a88fa97baa0a 100644
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diff --git a/data/core/images/terrain/cave/stone_walls/wall-stone-white-concave-tl.png b/data/core/images/terrain/cave/stone_walls/wall-stone-white-concave-tl.png
new file mode 100644
index 000000000000..de13d8302f01
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diff --git a/data/core/images/terrain/cave/stone_walls/wall-stone-white-concave-tr.png b/data/core/images/terrain/cave/stone_walls/wall-stone-white-concave-tr.png
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diff --git a/data/core/images/terrain/cave/stone_walls/wall-stone-white-convex-l.png b/data/core/images/terrain/cave/stone_walls/wall-stone-white-convex-l.png
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diff --git a/data/core/images/terrain/cave/stone_walls/wall-stone-white-convex-r.png b/data/core/images/terrain/cave/stone_walls/wall-stone-white-convex-r.png
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diff --git a/data/core/images/terrain/cave/stone_walls/wall-stone-white-corner-bl.png b/data/core/images/terrain/cave/stone_walls/wall-stone-white-corner-bl.png
new file mode 100644
index 000000000000..b0bb315780ab
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diff --git a/data/core/images/terrain/cave/stone_walls/wall-stone-white-tile.png b/data/core/images/terrain/cave/stone_walls/wall-stone-white-tile.png
new file mode 100644
index 000000000000..f7d8fc113731
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diff --git a/data/core/terrain-graphics.cfg b/data/core/terrain-graphics.cfg
index d1452d7e2fc9..2202f699de78 100644
--- a/data/core/terrain-graphics.cfg
+++ b/data/core/terrain-graphics.cfg
@@ -741,12 +741,13 @@
 {NEW:WALL2            (Xo*)      Xu*           (!,Xu*,Xo*)      cave/stone_walls/wall-mixed}
 {NEW:WALL                        Xu*           (!,Xu*,Xo*)      cave/wall-rough}
 
-{NEW:WALL_CORNER                 Xom		   (!,Xo*,Xu*)      cave/stone_walls/wall-stone-mine}
+# Xoi and Xom both have wooden trim, so "white" wall images are only needed for walls with visible faces.
+{NEW:WALL_CORNER                 Xoi		   (!,Xo*,Xu*)      cave/stone_walls/wall-stone-white}
+{NEW:WALL_CORNER                 Xom,Xoi		   (!,Xo*,Xu*)      cave/stone_walls/wall-stone-mine}
 {NEW:WALL_CORNER                 Xo*		   (!,Xo*,Xu*)      cave/stone_walls/wall-stone}
 {NEW:WALL_A10                    Xol           (!,Xu*,Xo*)      cave/stone_walls/lit/wall-stone-lit}
-{NEW:WALL                        Xom           (!,Xu*,Xo*)      cave/stone_walls/wall-stone-mine}
-# these are WIP, supposed to be white-washed interior walls
-#{NEW:WALL                        Xoi           (!,Xu*,Xo*)      cave/stone_walls/wall-stone-white}
+{NEW:WALL                        Xoi           (!,Xu*,Xo*)      cave/stone_walls/wall-stone-white}
+{NEW:WALL                        Xom,Xoi           (!,Xu*,Xo*)      cave/stone_walls/wall-stone-mine}
 {NEW:WALL                        Xo*           (!,Xu*,Xo*)      cave/stone_walls/wall-stone}
 
 # New Generic Castle-to Chasm transition