diff --git a/input/hdr.json b/input/hdr.json
index c3fd066..ebd69da 100644
--- a/input/hdr.json
+++ b/input/hdr.json
@@ -2,8 +2,8 @@
 	"version": 1.0,
 	"renderer": {
 		"threadCount": 0,
-		"sampleCount": 250,
-		"bounces": 30,
+		"sampleCount": 1,
+		"bounces": 2,
 		"antialiasing": true,
 		"tileWidth": 64,
 		"tileHeight": 64,
@@ -39,8 +39,8 @@
 		"outputFileName": "rendered",
 		"fileType": "png",
 		"count": 0,
-		"width": 1280,
-		"height": 800,
+		"width": 300,
+		"height": 200,
 		"ambientColor": {
 			"hdr": "input/HDRs/rooitou_park_1k.hdr",
 			"offset": 0,
