diff --git a/gloopblocks_cement.jpg b/basic_materials_cement_block.jpg
similarity index 100%
rename from gloopblocks_cement.jpg
rename to basic_materials_cement_block.jpg
diff --git a/technic_concrete_block.jpg b/basic_materials_concrete_block.jpg
similarity index 100%
rename from technic_concrete_block.jpg
rename to basic_materials_concrete_block.jpg
diff --git a/gloopblocks_wet_cement.png b/basic_materials_wet_cement.png
similarity index 100%
rename from gloopblocks_wet_cement.png
rename to basic_materials_wet_cement.png
diff --git a/bedrock_concrete.jpg b/bedrock_concrete.jpg
deleted file mode 100644
index 324f716..0000000
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diff --git a/changelog.txt b/changelog.txt
index 0308dba..6da5180 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,3 +1,6 @@
+2018-11-11: Rename and consolidate cement and concrete images; use 
+basic_materials filenames.
+
 2018-10-31: remove lower-res Lua controller images
 
 2018-10-27: Add image for moreblocks compressed dirt
diff --git a/prefab_concrete.jpg b/prefab_concrete.jpg
deleted file mode 100644
index c2fc80f..0000000
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diff --git a/prefab_concrete_door.png b/prefab_concrete_door.png
deleted file mode 100644
index 6393048..0000000
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diff --git a/prefab_concrete_door_bottom.jpg b/prefab_concrete_door_bottom.jpg
deleted file mode 100644
index d6a86df..0000000
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diff --git a/prefab_concrete_door_top.png b/prefab_concrete_door_top.png
deleted file mode 100644
index 78cd4d8..0000000
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diff --git a/streets_concrete.jpg b/streets_concrete.jpg
deleted file mode 100644
index fa0b39c..0000000
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