diff --git a/basic.fragment b/basic.fragment
index 12ec020..6f19c16 100644
--- a/basic.fragment
+++ b/basic.fragment
@@ -1,9 +1,10 @@
-#version 330 core
-out vec4 FragColor;
-  
-in vec4 vertexColor; // the input variable from the vertex shader (same name and same type)  
+
+uniform sampler2D tex0;
+
+varying vec4 v_color; // the input variable from the vertex shader (same name and same type)  
+varying vec2 v_texCoord;
 
 void main()
 {
-    FragColor = vertexColor;
+    gl_FragColor = texture2D(tex0, v_texCoord);
 } 
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index 17bc1a1..8c3b8db 100644
--- a/main.cpp
+++ b/main.cpp
@@ -78,7 +78,7 @@ bool initGLExtensions() {
 #endif
 
 GLuint compileShader(const char* source, GLuint shaderType) {
-	std::cout << "Compilando shader:" << std::endl << source << std::endl;
+	//std::cout << "Compilando shader:" << std::endl << source << std::endl;
 	// Create ID for shader
 	GLuint result = glCreateShader(shaderType);
 	// Define shader text
@@ -170,14 +170,16 @@ void presentBackBuffer(SDL_Renderer *renderer, SDL_Window* win, SDL_Texture* bac
 	// Coordenadas de la ventana donde pintar.
 	minx = 0.0f;
 	miny = 0.0f;
-	maxx = WIN_WIDTH;
-	maxy = WIN_HEIGHT;
+	maxx = WORLD_WIDTH;
+	maxy = WORLD_HEIGHT;
 
 	minu = 0.0f;
 	maxu = 1.0f;
 	minv = 0.0f;
 	maxv = 1.0f;
 
+    glViewport(0, 0, WIN_WIDTH, WIN_HEIGHT);
+
 	glBegin(GL_TRIANGLE_STRIP);
 		glTexCoord2f(minu, minv);
 		glVertex2f(minx, miny);
diff --git a/std.vertex b/std.vertex
index 75ebe82..268e8f9 100644
--- a/std.vertex
+++ b/std.vertex
@@ -3,7 +3,11 @@ varying vec2 v_texCoord;
 
 void main()
 {
+//    gl_Position = vec4(gl_Vertex.x-1.0, gl_Vertex.y-1.0, 0.0, 1.0);
+//    v_color = gl_Color;
+    v_texCoord = vec2(gl_MultiTexCoord0.x, 1.0-gl_MultiTexCoord0.y);
+
     gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
     v_color = gl_Color;
-    v_texCoord = vec2(gl_MultiTexCoord0);
+//    v_texCoord = vec2(gl_MultiTexCoord0);
 }
\ No newline at end of file