diff --git a/assets/BUILD b/assets/BUILD
index c57d822..dfa835c 100644
--- a/assets/BUILD
+++ b/assets/BUILD
@@ -1 +1,4 @@
-exports_files(["test-128px.png"])
+exports_files([
+    "test-128px.png",
+    "test-128px-roughness.png",
+])
diff --git a/assets/test-128px-roughness.png b/assets/test-128px-roughness.png
new file mode 100644
index 0000000..6121fdd
Binary files /dev/null and b/assets/test-128px-roughness.png differ