1.17 terrain graphics transitions update (#6588)

* small improvements to wooden walls

* intra-pile rubble terrain transition

* fixing some bad perspective in desert mountain transition images

data/core/terrain-graphics.cfg

@@ -835,6 +835,8 @@ C*,K*,X*,Q*,W*,Ai,M*,*^V*,*^B*,_off^_usr#enddef
 {NEW:WALL             Xu*            (Qx*,Ql*)                                 cave/wall-rough-chasm}
 #{NEW:WALL             Xu*            (!,Xu*)                                   cave/wall-rough}
 
+{NEW:WALL2_CORNER     (Xom,Xoi)      (Xos,Xot,Xoc,Xoa,Xof)           (!,Xu*,Xo*)      walls/stone/wall-minestone-mixed}
+{NEW:WALL2_CORNER     (Xos,Xot,Xoc,Xoa,Xof)        (Xom,Xoi)         (!,Xu*,Xo*)      walls/stone/wall-stonemine-mixed}
 {NEW:WALL2_CORNER     (Xom,Xoi)      Xu*           (!,Xu*,Xo*)      walls/stone/wall-mine-mixed}
 {NEW:WALL2            (Xom,Xoi)      Xu*           (!,Xu*,Xo*)      walls/stone/wall-mine-mixed}
 {NEW:WALL2_CORNER     (Xoa)      Xu*           (!,Xu*,Xo*)      walls/stone/ancient/wall-mixed}
@@ -911,6 +913,7 @@ C*,K*,X*,Q*,W*,Ai,M*,*^V*,*^B*,_off^_usr#enddef
 # Default layer is -500, so anything layering above should be higher.
 
 
+{NEW:TRANSITION_INTRA   (*^Dr)           -158     misc/rubble FLAG=intra}
 {NEW:TRANSITION            (Md,Mv)          (!,Md,Hhd,Mv,W*,S*)                -166     mountains/dry}
 
 # Special mountain to dry/desert terrain trans

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

@@ -837,6 +837,46 @@ transition_inverted#endarg
     [/terrain_graphics]
 #enddef
 
+#define NEW:TRANSITION_INTRA TERRAINLIST LAYER IMAGESTEM
+
+#arg ADJACENT
+{TERRAINLIST}#endarg
+
+#arg FLAG
+transition#endarg
+
+#arg IPF
+~NOP()#endarg
+
+    [terrain_graphics]
+        map="
+, 2
+* , *
+, 1
+* , *
+, *"
+        [tile]
+            pos=1
+            type={ADJACENT}
+            set_no_flag={FLAG}-@R0
+        [/tile]
+        [tile]
+            pos=2
+            type={TERRAINLIST}
+            # set_no_flag={FLAG}-@R3
+        [/tile]
+        [image]
+            name={IMAGESTEM}@V-@R0.png{IPF}
+            layer={LAYER}
+            base=98,98
+            center=90,144
+            variations=";2;3;4;5"
+        [/image]
+
+        rotations=n,ne,se,s,sw,nw
+    [/terrain_graphics]
+#enddef
+
 #define NEW:TRANSITION TERRAINLIST ADJACENT LAYER IMAGESTEM
 
 #arg LAYER2