diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24d20c3..9a2ba6d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
   via the numeric keypad or the YUBN keys (à la Rogue).
 - [Open-ended excavate](https://gridmonger.johnnovak.net/manual/basic-editing.html#open-ended-excavate)
   option to aid in exploring tunnel-style dungeons.
+- Option to pre-fill new levels with empty floors (for wall-style maps).
 - New [Arrow floor type](TODO) to represent moving floors and conveyor belts.
 - Option to select whether the Left/Right cursor keys perform strafing or
   turning in [Walk Mode](https://gridmonger.johnnovak.net/manual/moving-around.html#walk-mode).
diff --git a/TODO b/TODO
index 65bebfe..c02d450 100644
--- a/TODO
+++ b/TODO
@@ -16,7 +16,6 @@ TODO
 ====
 
   - add unlink command
-  - prefill level with empty floor (for wall style maps)
 
   - finish diagonal movement (numpad, YUBN)
   - improve restoring the window's size on screen dimension changes
diff --git a/src/actions.nim b/src/actions.nim
index 012d468..6a10e9d 100644
--- a/src/actions.nim
+++ b/src/actions.nim
@@ -657,7 +657,7 @@ proc pasteSelection*(map; loc, undoLoc: Location, sb: SelectionBuffer,
 # {{{ addNewLevel*()
 proc addNewLevel*(map; loc: Location,
                   locationName, levelName: string, elevation: int,
-                  rows, cols: Natural,
+                  rows, cols: Natural, fillFloorColor: Option[Natural],
                   overrideCoordOpts: bool, coordOpts: CoordinateOptions,
                   regionOpts: RegionOptions,
                   notes: string;
@@ -677,6 +677,13 @@ proc addNewLevel*(map; loc: Location,
                             regionOpts,
                             notes)
     newLevelId = newLevel.id
+
+    if fillFloorColor.isSome:
+      var cell: Cell
+      cell.floor      = fBlank
+      cell.floorColor = fillFloorColor.get.uint8
+      newLevel.fill(cell)
+
     m.setLevel(newLevel)
 
     var usd = usd
diff --git a/src/level.nim b/src/level.nim
index 9d19466..2ddb488 100644
--- a/src/level.nim
+++ b/src/level.nim
@@ -94,6 +94,14 @@ proc setWall*(l; r,c: Natural, dir: CardinalDir, w: Wall) =
 proc canSetWall*(l; r,c: Natural, dir: CardinalDir): bool {.inline.} =
   not l.isEmpty(r,c) or not l.isNeighbourCellEmpty(r,c, {dir})
 
+# }}}
+# {{{ fill*()
+proc fill*(l; rect: Rect[Natural], cell: Cell) =
+  l.cellGrid.fill(rect, cell)
+
+proc fill*(l; cell: Cell) =
+  l.cellGrid.fill(cell)
+
 # }}}
 
 # }}}
diff --git a/src/main.nim b/src/main.nim
index 9d4a4a6..428e8d8 100644
--- a/src/main.nim
+++ b/src/main.nim
@@ -813,32 +813,33 @@ type
 
 
   LevelPropertiesDialogParams = object
-    activeTab:         Natural
+    activeTab:           Natural
     activateFirstTextField: bool
 
     # General tab
-    locationName:      string
-    levelName:         string
-    elevation:         string
-    rows:              string
-    cols:              string
+    locationName:        string
+    levelName:           string
+    elevation:           string
+    rows:                string
+    cols:                string
+    fillWithEmptyFloors: bool
 
     # Coordinates tab
-    overrideCoordOpts: bool
-    origin:            Natural
-    rowStyle:          Natural
-    columnStyle:       Natural
-    rowStart:          string
-    columnStart:       string
+    overrideCoordOpts:   bool
+    origin:              Natural
+    rowStyle:            Natural
+    columnStyle:         Natural
+    rowStart:            string
+    columnStart:         string
 
     # Regions tab
-    enableRegions:     bool
-    colsPerRegion:     string
-    rowsPerRegion:     string
-    perRegionCoords:   bool
+    enableRegions:       bool
+    colsPerRegion:       string
+    rowsPerRegion:       string
+    perRegionCoords:     bool
 
     # Notes tab
-    notes:              string
+    notes:                string
 
 
   ResizeLevelDialogParams = object
@@ -4726,6 +4727,12 @@ proc newLevelDialog(dlg: var LevelPropertiesDialogParams; a) =
   if dlg.activeTab == 0:  # General
     commonLevelFields(dimensionsDisabled=false)
 
+    group:
+      koi.label("Fill with empty floors", style=a.theme.labelStyle)
+
+      koi.nextItemHeight(DlgCheckBoxSize)
+      koi.checkBox(dlg.fillWithEmptyFloors, style=a.theme.checkBoxStyle)
+
   elif dlg.activeTab == 1:  # Coordinates
     group:
       koi.label("Override map settings", style=a.theme.labelStyle)
@@ -4763,16 +4770,23 @@ proc newLevelDialog(dlg: var LevelPropertiesDialogParams; a) =
       rows = parseInt(dlg.rows)
       cols = parseInt(dlg.cols)
 
+    var fillFloorColor: Option[Natural]
+
     let cur = actions.addNewLevel(
       a.doc.map,
       a.ui.cursor,
+
       locationName = dlg.locationName,
-      levelName = dlg.levelName,
-      elevation = parseInt(dlg.elevation),
-      rows = rows,
-      cols = cols,
-      dlg.overrideCoordOpts,
+      levelName    = dlg.levelName,
+      elevation    = parseInt(dlg.elevation),
 
+      rows           = rows,
+      cols           = cols,
+      fillFloorColor = if dlg.fillWithEmptyFloors:
+                         a.ui.currFloorColor.Natural.some
+                       else: Natural.none,
+
+      dlg.overrideCoordOpts,
       coordOpts = CoordinateOptions(
         origin:      CoordinateOrigin(dlg.origin),
         rowStyle:    CoordinateStyle(dlg.rowStyle),
@@ -10776,7 +10790,6 @@ proc initApp(configFile: Option[string], mapFile: Option[string],
     )
   else: appEvents.disableAutoSave()
 
-  # TODO init from config
   with a.ui.notesListState:
     currFilter.noteType = NoteTypeFilter.fullSet
     currFilter.orderBy  = noType