diff --git a/examples/test/shaders/test.frag b/examples/test/shaders/test.frag
index 81f0743..81451db 100644
--- a/examples/test/shaders/test.frag
+++ b/examples/test/shaders/test.frag
@@ -30,8 +30,8 @@ vec3 ray_dir(float fov, vec2 uv) {
 }
 
 SceneResult scene_f(vec3 p) {
-	SceneResult ball = SceneResult(length(p-vec3(0, 2, 0)) - 2, 3.);
-	SceneResult ball2 = SceneResult(length(p-vec3(2*sin(u_Time), 2-2*cos(u_Time), 0)) - 1, 3.);
+	//SceneResult ball = SceneResult(length(p-vec3(0, 2, 0)) - 2, 3.);
+	//SceneResult ball2 = SceneResult(length(p-vec3(2*sin(u_Time), 2-2*cos(u_Time), 0)) - 1, 3.);
 	SceneResult plane = SceneResult(p.y+5, 2.);
 
 	// SceneResult box = SceneResult(
@@ -48,7 +48,16 @@ SceneResult scene_f(vec3 p) {
 	// 	fBox(p, vec3(1)),
 	// 	1.);
 
-	SceneResult res = min_sr(min_sr(ball, ball2), plane);
+	// SceneResult res = min_sr(min_sr(ball, ball2), plane);
+
+	p -= vec3(0, 2, 0);
+	//pR(p.yz, u_Time);
+
+	//float d = max(abs(p.x), max(abs(p.y), abs(p.z))) - 2.;
+	//float d = fBox(p, vec3(2));
+	float d = fCircle(p, 3) - 1;
+
+	SceneResult res = min_sr(plane, SceneResult(d, 3.));
 
 	return res;
 }
@@ -93,7 +102,7 @@ vec4 shade_material(vec3 p, vec3 norm, float mat_idx) {
 		return vec4(vec3(mix(0.8, 1.0, checker(p.xz))), 1);
 	}
 	if (mat_idx <= 3.0) {
-		return vec4(mix(vec3(0), vec3(0.05, 0, 0.1), dot(vec3(3, 3, 3), norm)), 1);
+		return mix(vec4(vec3(0), 1), vec4(0.05, 0, 0.1, 1), dot(vec3(3, 3, 3), norm));
 	}
 
 	return vec4(1, 0, 0, 1);