diff --git a/test/benchmark/smallpt/README.md b/test/benchmark/smallpt/README.md
index b94996b..6068a99 100644
--- a/test/benchmark/smallpt/README.md
+++ b/test/benchmark/smallpt/README.md
@@ -1,5 +1,9 @@
 # smallpt
 
+Based on https://www.kevinbeason.com/smallpt/
+
+<img align="center" width="50%" src="image.jpg">
+
 ### Results
 
 ```log