Wall terrain graphics (Xo*) work (#5173)

* terrain graphics - fix sconce/candle overlay on south-facing corners

* terrain graphics - some fixes and minor additions to stone walls, mostly Xot^Edb

* new terrain - add 'Xof', overgrown walls

* terrain graphics for Xof^Efm - flowers on walls

* terrain graphics - fix broken molding in standard stone wall

* terrain graphics - fix molding on catacombs

data/core/terrain-graphics.cfg

@@ -382,7 +382,8 @@ C*,K*,X*,Q*,W*,Ai,M*,*^V*,*^B*,_off^_usr#enddef
 
 # layer -500 is used for the flowers so they don't overlap adjacent trees,
 # castles, mountains and such
-{NEW:OVERLAY             *^Efm                                                     embellishments/flowers-mixed LAYER=-500}
+# need to disable these images for some combinations
+{NEW:OVERLAY             (!,Xof^Efm,!,*^Efm)                                       embellishments/flowers-mixed LAYER=-500}
 
 #Rubble
 {NEW:OVERLAY             *^Dr                                                      misc/rubble FLAG=rubble LAYER=-1}
@@ -828,23 +829,29 @@ C*,K*,X*,Q*,W*,Ai,M*,*^V*,*^B*,_off^_usr#enddef
 {NEW:WALL                        Xu*           (!,Xu*,Xo*)      cave/wall-rough}
 
 # 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*)      walls/stone/wall-stone-white}
-{NEW:WALL_CORNER                 Xom,Xoi		   (!,Xo*,Xu*)      walls/stone/wall-stone-mine}
-{NEW:WALL_CORNER                 Xoc		   (!,Xo*,Xu*)      walls/stone/clean/wall-stone}
-{NEW:WALL_CORNER                 Xoa		   (!,Xo*,Xu*)      walls/stone/ancient/wall-stone}
-{NEW:WALL_CORNER                 Xot		   (!,Xo*,Xu*)      walls/stone/catacombs/wall-stone}
-{NEW:WALL_CORNER                 Xo*		   (!,Xo*,Xu*)      walls/stone/wall-stone}
+{NEW:WALL_CORNER                 Xoi           (!,Xo*,Xu*)      walls/stone/wall-stone-white}
+{NEW:WALL_CORNER                 Xom,Xoi       (!,Xo*,Xu*)      walls/stone/wall-stone-mine}
+{NEW:WALL_CORNER                 Xoc           (!,Xo*,Xu*)      walls/stone/clean/wall-stone}
+{NEW:WALL_CORNER                 Xoa           (!,Xo*,Xu*)      walls/stone/ancient/wall-stone}
+{NEW:WALL_CORNER                 Xot^Edb       (!,Xu*,Xo*)      walls/stone/catacombs/wall-bones ALTERNATIVE=Xo*}
+{NEW:WALL_CORNER                 Xot           (!,Xo*,Xu*)      walls/stone/catacombs/wall-stone ALTERNATIVE=Xo*}
+{NEW:WALL_CORNER                 Xof^Efm       (!,Xo*,Xu*)      walls/stone/overgrown/wall-flowers ALTERNATIVE=Xof}
+{NEW:WALL_CORNER                 Xof           (!,Xo*,Xu*)      walls/stone/overgrown/wall-stone}
+{NEW:WALL_CORNER                 Xo*           (!,Xo*,Xu*)      walls/stone/wall-stone}
 {NEW:WALL_A10                    Xol           (!,Xu*,Xo*)      walls/stone/lit/wall-stone-lit}
 {NEW:WALL                        Xoi           (!,Xu*,Xo*)      walls/stone/wall-stone-white}
 {NEW:WALL_MINOR_VARIANTS         Xoi           Xom              (!,Xu*,Xo*)      walls/stone/wall-stone-white}
-{NEW:WALL                        Xom,Xoi           (!,Xu*,Xo*)      walls/stone/wall-stone-mine}
+{NEW:WALL                        Xom,Xoi       (!,Xu*,Xo*)      walls/stone/wall-stone-mine}
 {NEW:WALL                        Xoc           (!,Xu*,Xo*)      walls/stone/clean/wall-stone}
 {NEW:WALL_MINOR_VARIANTS         Xoc           Xo*              (!,Xu*,Xo*)      walls/stone/clean/wall-stone}
 {NEW:WALL                        Xoa           (!,Xu*,Xo*)      walls/stone/ancient/wall-stone}
-{NEW:WALL_MINOR_VARIANTS         Xoa           Xo*              (!,Xu*,Xo*)      walls/stone/ancient/wall-stone}
-{NEW:WALL                        Xot^Edb       (!,Xu*,Xo*)      walls/stone/catacombs/wall-bones FLAG=bones BASE=1,108}
+# causes some bugs that need to be worked out first
+# {NEW:WALL_MINOR_VARIANTS         Xoa           Xo*              (!,Xu*,Xo*)      walls/stone/ancient/wall-stone}
+{NEW:WALL                        Xot^Edb       (!,Xu*,Xo*)      walls/stone/catacombs/wall-stone OVERLAYIMAGE=terrain/walls/stone/catacombs/wall-bones}
 {NEW:WALL                        Xot           (!,Xu*,Xo*)      walls/stone/catacombs/wall-stone}
 {NEW:WALL_MINOR_VARIANTS         Xot           Xo*              (!,Xu*,Xo*)      walls/stone/catacombs/wall-stone}
+{NEW:WALL                        Xof^Efm       (!,Xu*,Xo*)      walls/stone/overgrown/wall-stone OVERLAYIMAGE=terrain/walls/stone/overgrown/wall-flowers}
+{NEW:WALL                        Xof           (!,Xu*,Xo*)      walls/stone/overgrown/wall-stone}
 {NEW:WALL                        Xo*           (!,Xu*,Xo*)      walls/stone/wall-stone}
 
 # New Generic Castle-to Chasm transition

data/core/terrain-graphics/new-macros.cfg

@@ -1961,6 +1961,12 @@ corner#endarg
 #enddef
 
 #define NEW:WALL_CORNER TERRAINLIST ADJACENT IMAGESTEM
+
+# default to some very unlikely terrain code, and not leaving empty in case that offends validation testing
+#arg ALTERNATIVE
+_off^Fp#endarg 
+
+
     [terrain_graphics]
         map="
 ,  4
@@ -1975,12 +1981,12 @@ corner#endarg
         [/tile]
         [tile]
             pos=2
-            type={TERRAINLIST}
+            type={TERRAINLIST},{ALTERNATIVE}
             set_no_flag=wall-@R1
         [/tile]
         [tile]
             pos=3
-            type={TERRAINLIST}
+            type={TERRAINLIST},{ALTERNATIVE}
             set_no_flag=wall-@R4
         [/tile]
         [tile]
@@ -2169,6 +2175,11 @@ wall#endarg
 #arg BASE
 54,72#endarg
 
+# this is because I could not figure out how to get layering with base key to work for enough rotations in Xot^Edb
+# there is a walls/dummy variation to suppress image-not-found errors
+#arg OVERLAYIMAGE
+terrain/walls/dummy/dummy#endarg
+
     [terrain_graphics]
         map="
 2
@@ -2196,7 +2207,8 @@ wall#endarg
         [image]
             layer={LAYER}
             base={BASE}
-            name={IMAGESTEM}@V-convex-@R0.png
+            # no @V in the BLIT() because there may not be a matching overlay image for each base variation
+            name={IMAGESTEM}@V-convex-@R0.png~BLIT({OVERLAYIMAGE}-convex-@R0.png) 
             variations=";2;3;4;5;6"
         [/image]
     [/terrain_graphics]
@@ -2226,14 +2238,16 @@ wall#endarg
         probability={PROB}
 
         [image]
-            layer=0
+            layer={LAYER}
             base={BASE}
-            name={IMAGESTEM}@V-concave-@R0.png
+            name={IMAGESTEM}@V-concave-@R0.png~BLIT({OVERLAYIMAGE}-concave-@R0.png)
             variations=";2;3;4;5;6"
         [/image]
     [/terrain_graphics]
 #enddef
 
+# this macro is used to allow TERRAINLIST to be drawn in certain cases where current assets would fail to be drawn
+# and VARIANT would take over
 #define NEW:WALL_MINOR_VARIANTS TERRAINLIST VARIANT ADJACENT IMAGESTEM
 
 #arg PROB
@@ -3389,7 +3403,7 @@ wall#endarg
         [/tile]
         [tile]
             pos=3
-            type={TERRAINLIST}
+            type={TERRAINLIST},{ADJACENT}
         [/tile]
     [/terrain_graphics]
     # these are the cases we know we want to quash, that are not covered by the rotations below
@@ -3526,7 +3540,7 @@ wall#endarg
         [/tile]
         [tile]
             pos=3
-            type={TERRAINLIST}
+            type={TERRAINLIST},{ADJACENT}
         [/tile]
 
 #        rotations=bl

data/core/terrain.cfg

@@ -1349,6 +1349,17 @@ Occasionally caves are <italic>text='illuminated'</italic>."
     editor_group=cave,obstacle
 [/terrain_type]
 
+[terrain_type]
+    symbol_image=void/void
+    editor_image=walls/stone/overgrown/wall-stone-tile
+    id=wall_stone_overgrown
+    name= _ "Overgrown Wall"
+    editor_name= _ "Overgrown Stone Wall"
+    string=Xof
+    aliasof=Xt
+    editor_group=cave,obstacle
+[/terrain_type]
+
 #
 #    ## Doors and gates ##
 #