fix saturation threshold not being respected for grass textures

src/main/kotlin/mods/octarinecore/Utils.kt

@@ -8,7 +8,10 @@ import java.lang.Math.*
 
 const val PI2 = 2.0 * PI
 
+/** Strip the given prefix off the start of the string, if present */
 inline fun String.stripStart(str: String) = if (startsWith(str)) substring(str.length) else this
+
+/** Strip the given prefix off the start of the resource path, if present */
 inline fun ResourceLocation.stripStart(str: String) = ResourceLocation(resourceDomain, resourcePath.stripStart(str))
 
 /** Mutating version of _map_. Replace each element of the list with the result of the given transformation. */

src/main/kotlin/mods/octarinecore/client/resource/Utils.kt

@@ -63,7 +63,7 @@ val BufferedImage.asStream: InputStream get() =
  * and the result transformed back to the RGB color space.
  */
 val TextureAtlasSprite.averageColor: Int? get() {
-    val locationNoDirs = ResourceLocation(iconName)
+    val locationNoDirs = ResourceLocation(iconName).stripStart("blocks/")
     val locationWithDirs = ResourceLocation(locationNoDirs.resourceDomain, "textures/blocks/%s.png".format(locationNoDirs.resourcePath))
     val image = resourceManager[locationWithDirs]?.loadImage() ?: return null