diff --git a/example/perspective2/main.go b/example/perspective2/main.go
new file mode 100644
index 000000000..310e1ca4b
--- /dev/null
+++ b/example/perspective2/main.go
@@ -0,0 +1,63 @@
+/*
+Copyright 2014 Hajime Hoshi
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/ebitenutil"
+	_ "image/jpeg"
+	"log"
+)
+
+const (
+	screenWidth  = 320
+	screenHeight = 240
+)
+
+type Game struct {
+	gophersTexture   *ebiten.Texture
+	textRenderTarget *ebiten.RenderTarget
+}
+
+func (g *Game) Update(gr ebiten.GraphicsContext) error {
+	gr.PushRenderTarget(g.textRenderTarget)
+	gr.Fill(0x80, 0x40, 0x40)
+	ebitenutil.DebugPrint(gr, "Hello, World!")
+	gr.PopRenderTarget()
+
+	gr.Fill(0x40, 0x40, 0x80)
+	geo := ebiten.GeometryMatrixI()
+	clr := ebiten.ColorMatrixI()
+	ebiten.DrawWholeTexture(gr, g.textRenderTarget.Texture(), geo, clr)
+	return nil
+}
+
+func main() {
+	g := new(Game)
+	var err error
+	g.gophersTexture, _, err = ebitenutil.NewTextureFromFile("images/gophers.jpg", ebiten.FilterNearest)
+	if err != nil {
+		log.Fatal(err)
+	}
+	g.textRenderTarget, err = ebiten.NewRenderTarget(screenWidth, screenHeight, ebiten.FilterNearest)
+	if err != nil {
+		log.Fatal(err)
+	}
+	if err := ebiten.Run(g.Update, screenWidth, screenHeight, 2, "Perspective (Ebiten Demo)"); err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/internal/opengl/internal/shader/shader.go b/internal/opengl/internal/shader/shader.go
index f5a63e3ac..fde890a87 100644
--- a/internal/opengl/internal/shader/shader.go
+++ b/internal/opengl/internal/shader/shader.go
@@ -54,18 +54,6 @@ void main(void) {
   vertex_out_tex_coord1 = (modelview_matrix_n * vec4(tex_coord1, 0, 1)).xy;
   gl_Position = projection_matrix * modelview_matrix * vec4(vertex, 0, 1);
 }
-`,
-	},
-	// TODO: Now this shader is not used
-	shaderFragment: {
-		shaderType: gl.FRAGMENT_SHADER,
-		source: `
-uniform sampler2D texture;
-varying vec2 vertex_out_tex_coord0;
-
-void main(void) {
-  gl_FragColor = texture2D(texture, vertex_out_tex_coord0);
-}
 `,
 	},
 	shaderColorMatrix: {
@@ -86,17 +74,6 @@ void main(void) {
   gl_FragColor.a = color0.a + color1.a - color0.a * color1.a;
   gl_FragColor.rgb = (color0.a * color0.rgb + (1.0 - color0.a) * color1.a * color1.rgb) / gl_FragColor.a;
 }
-`,
-	},
-	// TODO: Now this shader is not used
-	shaderSolidColor: {
-		shaderType: gl.FRAGMENT_SHADER,
-		source: `
-uniform vec4 color;
-
-void main(void) {
-  gl_FragColor = color;
-}
 `,
 	},
 }