diff --git a/Libraries/OpenComputersGL/Materials.lua b/Libraries/OpenComputersGL/Materials.lua
index 5b22c2d2..d498814d 100755
--- a/Libraries/OpenComputersGL/Materials.lua
+++ b/Libraries/OpenComputersGL/Materials.lua
@@ -12,8 +12,8 @@ materials.types = {
 function materials.newDebugTexture(width, height, h)
 	local texture = {width = width, height = height}
 		
-	local bStep = 1 / height
-	local sStep = 1 / width
+	local bStep = 1 / width
+	local sStep = 1 / height
 
 	local s, b = 0, 0
 	local blackSquare = false