diff --git a/Defining-custom-shaders.md b/Defining-custom-shaders.md
index dc6bd8d..121ea27 100644
--- a/Defining-custom-shaders.md
+++ b/Defining-custom-shaders.md
@@ -85,5 +85,5 @@ The settings for the TopoHDShader include:
 
 - _colorN_ : For N is from 0 to 255, and corresponds to the Y coordinate.  Each value provided is an #RRGGBB color to be used for blocks with an altitude of N (Y=N).  By default, _color0_ is #000000 and _color255_ is #FFFFFF.  Any values not provided will be interpolated based on the two nearest values that are defined.
 
-- _hiddenids_ : Optional parameter, providing a list of block IDs to be hidden during generation of the topological map.  Default value is just air - [ 0 ].  Value should be list of comma separated numbers, enclosed with square brackets (e.g. "[ 6, 17, 18, 31, 32, 37, 38, 39, 40, 50, 55, 78, 81, 83, 86, 99, 100, 103, 104, 105, 111, 115 ]").
+- _hiddennames_ : Optional parameter, providing a list of block namess to be hidden during generation of the topological map.  Default value is just air - [ air ].  Values should be in array format. e.g. `[ air, oak_plank, cobblestone, diamond_ore ]`.