diff --git a/context/cube.lua b/context/cube.lua
index f026976..c894edc 100644
--- a/context/cube.lua
+++ b/context/cube.lua
@@ -1,8 +1,7 @@
 function mtscad.Context:cube(x, y, z)
-    -- TODO: deal with negative sizes
-    local pos2 = vector.add(self.pos, {x=x-1, y=y-1, z=z-1})
+    -- TODO: prevent negative sizes
     local pos1 = vector.copy(self.pos)
-    pos1, pos2 = mtscad.sort_pos(pos1, pos2)
+    local pos2 = vector.add(self.pos, {x=x-1, y=y-1, z=z-1})
 
     for xi=pos1.x,pos2.x do
         for yi=pos1.y,pos2.y do
diff --git a/context/grid.lua b/context/grid.lua
new file mode 100644
index 0000000..f6ff076
--- /dev/null
+++ b/context/grid.lua
@@ -0,0 +1,20 @@
+
+function mtscad.Context:grid(x, y, z)
+    -- TODO: prevent negative sizes
+    local pos1 = vector.copy(self.pos)
+    local pos2 = vector.add(self.pos, {x=x-1, y=y-1, z=z-1})
+
+    -- TODO: lines between outer positions
+    for xi=pos1.x,pos2.x,x-1 do
+        for yi=pos1.y,pos2.y,y-1 do
+            for zi=pos1.z,pos2.z,z-1 do
+                local ipos = { x=xi, y=yi, z=zi }
+                local tpos = mtscad.transform_pos(pos1, ipos, self.rotation)
+                local tnode = mtscad.transform_node(self.node, self.rotation)
+                minetest.set_node(tpos, tnode)
+            end
+        end
+    end
+    return self
+end
+
diff --git a/init.lua b/init.lua
index 469c5b6..81b2fa7 100644
--- a/init.lua
+++ b/init.lua
@@ -8,6 +8,7 @@ dofile(MP .. "/context/execute.lua")
 dofile(MP .. "/context/translate.lua")
 dofile(MP .. "/context/rotate.lua")
 dofile(MP .. "/context/cube.lua")
+dofile(MP .. "/context/grid.lua")
 dofile(MP .. "/context/slope.lua")
 dofile(MP .. "/util.lua")
 dofile(MP .. "/test.lua")
\ No newline at end of file
diff --git a/test.lua b/test.lua
index bdba6de..228b01f 100644
--- a/test.lua
+++ b/test.lua
@@ -1,15 +1,4 @@
 
-local function cube_outliers(ctx, size)
-    ctx
-    :cube(size, 1, 1)
-    :cube(1, size, 1)
-    :cube(1, 1, size)
-    :translate(size-1, 0, size-1)
-    :cube(-size, 1, 1)
-    :cube(1, size, 1)
-    :cube(1, 1, -size)
-end
-
 local function rot_test(ctx)
     ctx
     :with({ name="wool:red" })
@@ -43,7 +32,7 @@ local function test_code(ctx)
     ctx
     :with({ name="default:copperblock" })
     :translate(2,2,2)
-    :execute(cube_outliers, 5)
+    :grid(5, 5, 5)
 end
 
 minetest.register_chatcommand("test", {