diff --git a/ground/sky/cloud.arc b/ground/sky/cloud.arc
new file mode 100644
index 000000000..ec2343d81
--- /dev/null
+++ b/ground/sky/cloud.arc
@@ -0,0 +1,135 @@
+Object cloud_1_1_1
+name cloud
+face cloud_1_1.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_1_2_1
+name cloud
+face cloud_1_2.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_1_3_1
+name cloud
+face cloud_1_3.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_2_1_1
+name cloud
+face cloud_2_1.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_2_2_1
+name cloud
+face cloud_2_2.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_2_3_1
+name cloud
+face cloud_2_3.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_3_1_1
+name cloud
+face cloud_3_1.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_3_2_1
+name cloud
+face cloud_3_2.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_3_3_1
+name cloud
+face cloud_3_3.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_4_1_1
+name cloud
+face cloud_4_1.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_4_2_1
+name cloud
+face cloud_4_2.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_4_3_1
+name cloud
+face cloud_4_3.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_5_1_1
+name cloud
+face cloud_5_1.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_5_2_1
+name cloud
+face cloud_5_2.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
+Object cloud_5_3_1
+name cloud
+face cloud_5_3.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
diff --git a/ground/sky/cloud_1_1.base.x11.png b/ground/sky/cloud_1_1.base.x11.png
new file mode 100644
index 000000000..70fa330ae
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diff --git a/ground/sky/cloud_1_2.base.x11.png b/ground/sky/cloud_1_2.base.x11.png
new file mode 100644
index 000000000..5b2a058f8
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diff --git a/ground/sky/cloud_1_3.base.x11.png b/ground/sky/cloud_1_3.base.x11.png
new file mode 100644
index 000000000..683688250
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diff --git a/ground/sky/cloud_2_1.base.x11.png b/ground/sky/cloud_2_1.base.x11.png
new file mode 100644
index 000000000..3ff3e1c5c
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diff --git a/ground/sky/cloud_2_2.base.x11.png b/ground/sky/cloud_2_2.base.x11.png
new file mode 100644
index 000000000..b0e0dc61e
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diff --git a/ground/sky/cloud_2_3.base.x11.png b/ground/sky/cloud_2_3.base.x11.png
new file mode 100644
index 000000000..4501dfc43
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diff --git a/ground/sky/cloud_3_1.base.x11.png b/ground/sky/cloud_3_1.base.x11.png
new file mode 100644
index 000000000..2c09fc48b
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diff --git a/ground/sky/cloud_3_2.base.x11.png b/ground/sky/cloud_3_2.base.x11.png
new file mode 100644
index 000000000..a20788b53
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diff --git a/ground/sky/cloud_3_3.base.x11.png b/ground/sky/cloud_3_3.base.x11.png
new file mode 100644
index 000000000..6467ebcf2
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diff --git a/ground/sky/cloud_4_1.base.x11.png b/ground/sky/cloud_4_1.base.x11.png
new file mode 100644
index 000000000..c9fb8347c
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diff --git a/ground/sky/cloud_4_2.base.x11.png b/ground/sky/cloud_4_2.base.x11.png
new file mode 100644
index 000000000..0a5ba2bc8
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diff --git a/ground/sky/cloud_4_3.base.x11.png b/ground/sky/cloud_4_3.base.x11.png
new file mode 100644
index 000000000..48cc7edeb
Binary files /dev/null and b/ground/sky/cloud_4_3.base.x11.png differ
diff --git a/ground/sky/cloud_5_1.base.x11.png b/ground/sky/cloud_5_1.base.x11.png
new file mode 100644
index 000000000..88332f91c
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diff --git a/ground/sky/cloud_5_2.base.x11.png b/ground/sky/cloud_5_2.base.x11.png
new file mode 100644
index 000000000..71fb66226
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diff --git a/ground/sky/cloud_5_3.base.x11.png b/ground/sky/cloud_5_3.base.x11.png
new file mode 100644
index 000000000..092784b3f
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diff --git a/ground/sky/empty_sky.arc b/ground/sky/empty_sky.arc
new file mode 100644
index 000000000..ce2984176
--- /dev/null
+++ b/ground/sky/empty_sky.arc
@@ -0,0 +1,9 @@
+Object empty_sky
+name sky
+face sky.x11
+type 67
+move_on walk
+is_floor 1
+no_pick 1
+move_slow walk
+end
diff --git a/ground/sky/sky.base.x11.png b/ground/sky/sky.base.x11.png
new file mode 100644
index 000000000..5b595eca8
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