diff --git a/Defining-custom-shaders.md b/Defining-custom-shaders.md
index 121ea27..b1be721 100644
--- a/Defining-custom-shaders.md
+++ b/Defining-custom-shaders.md
@@ -10,6 +10,10 @@ There are currently three basic classes of shaders, any of which can be used to
 
 - **org.dynmap.hdmap.TopoHDShader** - this shader colors the map to present a topographical map view, based on altitude of the blocks rendered.
 
+- **org.dynmap.hdmap.ChunkStatusHDShader** - this is a diagnostic shader, that can be used to produce a map of the 'Status' of the various chunks in a world - see [Chunk Status Colors] for mapping of status values to colors.
+
+- **org.dynmap.hdmap.ChunkVersionHDShader** - this is a diagnostic shader, that can be used to produce a map of the 'DataVersion' of the various chunks in a world, which are mapped to colors based on the Minecraft version of the current encoding of a given chunk (worlds created using older versions of Minecraft are often not upgraded automatically until they are loaded by player activity after a server is upgraded)  - see [Chunk Version Colors] for mapping of status values to colors.
+
 ## Defining a custom DefaultHDShader shader
 The DefaultHDShader class supports the following configuration settings: