diff --git a/source/behavior/blocks/format/components/material_instances.json b/source/behavior/blocks/format/components/material_instances.json
index 8690f57c..e2146575 100644
--- a/source/behavior/blocks/format/components/material_instances.json
+++ b/source/behavior/blocks/format/components/material_instances.json
@@ -43,7 +43,7 @@
             "default": "opaque",
             "description": "The render method to use. Must be one of these options: opaque - Used for a regular block texture without an alpha layer. Does not allow for transparency or translucency. double_sided - Used for completely disabling backface culling. blend - Used for a block like stained glass. Allows for transparency and translucency (slightly transparent textures). alpha_test - Used for a block like the vanilla (unstained) glass. Does not allow for translucency, only fully opaque or fully transparent textures. Also disables backface culling.",
             "markdownDescription": "The render method to use. Must be one of these options: \nopaque - Used for a regular block texture without an alpha layer. Does not allow for transparency or translucency.\ndouble_sided - Used for completely disabling backface culling.\nblend - Used for a block like stained glass. Allows for transparency and translucency (slightly transparent textures).\nalpha_test - Used for a block like the vanilla (unstained) glass. Does not allow for translucency, only fully opaque or fully transparent textures. Also disables backface culling.",
-            "enum": ["opaque", "double_sided", "blend", "alpha_test"]
+            "enum": ["opaque", "double_sided", "blend", "alpha_test", "alpha_test_single_sided"]
           },
           "texture": {
             "title": "Texture",