diff --git a/dotscape b/dotscape
index d82b79b..dd33a02 100755
Binary files a/dotscape and b/dotscape differ
diff --git a/fonts/unknown-char.dsc b/fonts/unknown-char.dsc
new file mode 100644
index 0000000..a3831e1
--- /dev/null
+++ b/fonts/unknown-char.dsc
@@ -0,0 +1,8 @@
+x 0.599999964237 y ~0.466666638851 x 0.599999964237 y 0.466666638851 x 0.466666638851 y 0.466666638851
+x 0.466666638851 y 0.466666638851 x 0.466666638851 y ~0.466666638851 x 0.599999964237 y ~0.466666638851
+x 0.599999964237 y 0.599999964237 x ~0.466666668653 y 0.599999964237 x ~0.466666668653 y 0.466666638851
+x ~0.466666668653 y 0.466666638851 x 0.599999964237 y 0.466666638851 x 0.599999964237 y 0.599999964237
+x ~0.466666668653 y 0.599999964237 x ~0.466666668653 y ~0.466666638851 x ~0.599999964237 y ~0.466666638851
+x ~0.599999964237 y ~0.466666638851 x ~0.599999964237 y 0.599999964237 x ~0.466666668653 y 0.599999964237
+x 0.599999964237 y ~0.466666638851 x ~0.599999964237 y ~0.466666638851 x ~0.599999964237 y ~0.599999964237
+x ~0.599999964237 y ~0.599999964237 x 0.599999964237 y ~0.599999964237 x 0.599999964237 y ~0.466666638851
diff --git a/fonts/unknown-char.sml b/fonts/unknown-char.sml
new file mode 100644
index 0000000..47dd9fd
--- /dev/null
+++ b/fonts/unknown-char.sml
@@ -0,0 +1,63 @@
+structure UnknownChar =
+struct
+  fun lerp (startX, startY, drawWidth, drawHeight, windowWidth, windowHeight, r, g, b) : Real32.real vector =
+    let
+       val startX = Real32.fromInt startX
+       val startY = Real32.fromInt startY
+       val endY = windowHeight - startY
+       val startY = windowHeight - (startY + drawHeight)
+       val endX = startX + drawWidth
+       val windowHeight = windowHeight / 2.0
+       val windowWidth = windowWidth / 2.0
+    in
+       #[      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.733333349228)) + (endY * 0.733333349228)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.733333349228)) + (endX * 0.733333349228)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.733333349228)) + (endY * 0.733333349228)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.733333349228)) + (endX * 0.733333349228)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.733333349228)) + (endY * 0.733333349228)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.733333349228)) + (endX * 0.733333349228)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.799999952316)) + (endY * 0.799999952316)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.266666650772)) + (endX * 0.266666650772)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.799999952316)) + (endY * 0.799999952316)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.266666650772)) + (endX * 0.266666650772)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.733333349228)) + (endY * 0.733333349228)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.266666650772)) + (endX * 0.266666650772)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.733333349228)) + (endY * 0.733333349228)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.733333349228)) + (endY * 0.733333349228)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.799999952316)) + (endY * 0.799999952316)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.266666650772)) + (endX * 0.266666650772)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.799999952316)) + (endY * 0.799999952316)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.266666650772)) + (endX * 0.266666650772)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.200000017881)) + (endX * 0.200000017881)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.200000017881)) + (endX * 0.200000017881)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.200000017881)) + (endX * 0.200000017881)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.799999952316)) + (endY * 0.799999952316)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.266666650772)) + (endX * 0.266666650772)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.799999952316)) + (endY * 0.799999952316)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.200000017881)) + (endX * 0.200000017881)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.200000017881)) + (endX * 0.200000017881)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.200000017881)) + (endY * 0.200000017881)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.200000017881)) + (endX * 0.200000017881)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.200000017881)) + (endY * 0.200000017881)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.200000017881)) + (endY * 0.200000017881)) / windowHeight) - 1.0, r, g, b,
+      (((startX * (1.0 - 0.799999952316)) + (endX * 0.799999952316)) / windowWidth) - 1.0,
+      (((startY * (1.0 - 0.266666680574)) + (endY * 0.266666680574)) / windowHeight) - 1.0, r, g, b
+    ]
+  end
+end
\ No newline at end of file
diff --git a/imperative-shell/file-thread.sml b/imperative-shell/file-thread.sml
index 2320fc1..5551cb8 100644
--- a/imperative-shell/file-thread.sml
+++ b/imperative-shell/file-thread.sml
@@ -10,9 +10,9 @@ struct
 
   datatype parse_result = OK of AppType.triangle list | PARSE_ERROR
 
-  val structureName = "UpperCaseZ"
-  val filename = "fonts/upper-case-z.dsc"
-  val exportFilename = "fonts/upper-case-z.sml"
+  val structureName = "UnknownChar"
+  val filename = "fonts/unknown-char.dsc"
+  val exportFilename = "fonts/unknown-char.sml"
 
   fun ndcToLerpX num =
     let