CLOSES #1418

src/core/Game2.lua

@@ -1968,6 +1968,7 @@ function Game2:applyOptions()
   })
   require("src.core.VideoMode").applyOptions(options)
   require("src.core.FrameCap").applyOptions(options)
+  require("src.world.gen2.BorderFill").applyOptions(options)
   local GBCFX = require("src.render.GBCFX")
   if GBCFX.applyOptions(options) and self.save then
     -- applyOptions returns true when it had to clear an unsupported level.

src/core/gen2/Save.lua

@@ -274,6 +274,9 @@ Save.DEFAULT_OPTIONS = {
   color = "gbc",
   videoMode = "windowed",
   fpsCap = 60,
+  -- VOID FILL: fade | water | trees | black.  fade is each map header's own
+  -- border block with the dissolve across a boundary (#1418).
+  voidFill = "fade",
   musicVol = 7,             -- 0-7, like the GB's NR50 master volume
   sfxVol = 7,               -- 0-7
   musicFilter = 0,          -- low-pass steps, 0 = off