diff --git a/output.png b/output.png
index 3bea124..d2a5cb7 100644
Binary files a/output.png and b/output.png differ
diff --git a/scenes/furnace.json b/scenes/furnace.json
index 4797040..ea30ed9 100644
--- a/scenes/furnace.json
+++ b/scenes/furnace.json
@@ -4,10 +4,10 @@
     },
 
     "sphere": {
-	"position": [0.0, 0.0, -1.0],
+	"position": [0.0, 0.0, -2.0],
 	"radius": 1.0,
 	"material": {
-	    "diffuse": [0.5, 0.5, 0.5],
+	    "diffuse": [0.1, 0.1, 0.1]
 	}
     }
 }