diff --git a/examples/triangles.yaml b/examples/triangles.yaml
index f4ca91d..c7905be 100644
--- a/examples/triangles.yaml
+++ b/examples/triangles.yaml
@@ -35,7 +35,7 @@ objects:
         g: 1.0
         b: 1.0
       transparency: 1.0
-      index: 1.9
+      index: 1.5
     texture:
       type: uniform
       color: