diff --git a/3-mid/opengl/assets/shader/lit_textured_x2.frag b/3-mid/opengl/assets/shader/lit_textured_x2.frag
deleted file mode 100644
index 17020f5..0000000
--- a/3-mid/opengl/assets/shader/lit_textured_x2.frag
+++ /dev/null
@@ -1,121 +0,0 @@
-struct light
-{
-   vec4    Site;
-   vec3    Color;
-   float   Attenuation;
-   float   ambient_Coefficient;
-   float   cone_Angle;
-   vec3    cone_Direction;
-};
-
-
-uniform mat4        model_Transform;
-uniform mat3        inverse_model_Rotation;
-uniform vec3        camera_Site;
-uniform vec3        specular_Color;    // The materials specular color.
-
-uniform int         light_Count;
-uniform light       Lights [50];
-
-
-in  vec3   frag_Site;
-in  vec3   frag_Normal;
-in  vec2   frag_Coords;
-in  float  frag_Shine;
-
-out vec4   final_Color;
-
-
-
-
-vec3
-apply_Light (light   Light, 
-             vec3    surface_Color, 
-             vec3    Normal, 
-             vec3    surface_Site, 
-             vec3    Surface_to_Camera)
-{
-    vec3    Surface_to_Light;
-    float   Attenuation = 1.0;
-    
-    if (Light.Site.w == 0.0)
-    {
-        // Directional light.
-        //
-        Surface_to_Light = normalize (-Light.Site.xyz);
-        Attenuation      = 1.0;     // No attenuation for directional lights.
-    } 
-    else
-    {
-        // Point light.
-        //
-        vec3    Surface_to_Light_vector = Light.Site.xyz - surface_Site;
-        float   Distance_to_Light       = length (Surface_to_Light_vector);
-
-        Surface_to_Light = normalize (Surface_to_Light_vector);
-        Attenuation      =   1.0
-                           / (  1.0 
-                              +   Light.Attenuation
-                                * pow (Distance_to_Light, 2));
-
-        // Cone restrictions which affects attenuation.
-        //
-        float   Light_to_Surface_Angle = degrees (acos (dot (-Surface_to_Light, 
-                                                             normalize (Light.cone_Direction))));
-        
-        if (Light_to_Surface_Angle > Light.cone_Angle)
-        {
-            Attenuation = 0.0;
-        }
-    }
-
-    vec3    lit_surface_Color    = surface_Color * Light.Color;
-    vec3    Ambient              = Light.ambient_Coefficient * lit_surface_Color;
-    float   diffuse_Coefficient  = max (0.0, 
-                                        dot (Normal,
-                                             Surface_to_Light));                   
-    vec3    Diffuse              = diffuse_Coefficient * lit_surface_Color;
-    float   specular_Coefficient = 0.0;
-
-    if (diffuse_Coefficient > 0.0)
-        specular_Coefficient = pow (max (0.0, 
-                                         dot (Surface_to_Camera, 
-                                              reflect (-Surface_to_Light,
-                                                       Normal))),
-                                    frag_Shine);
-
-    vec3   Specular = specular_Coefficient * specular_Color * Light.Color;
-
-    return Ambient + Attenuation * (Diffuse + Specular);     // Linear color (before gamma correction).
-}
-
-
-
-
-void
-main()
-{
-    vec3   surface_Site      = vec3 (  model_Transform
-                                     * vec4 (frag_Site, 1));
-    vec4   surface_Color     = apply_Texturing (frag_Coords);
-    vec3   Surface_to_Camera = normalize (camera_Site - surface_Site);
-    vec3   Normal            = normalize (  frag_Normal
-                                          * inverse_model_Rotation);
-    // Combine color from all the lights.
-    //
-    vec3   linear_Color = vec3 (0);
-    
-    for (int i = 0;   i < light_Count;   ++i)
-    {
-        linear_Color += apply_Light (Lights [i],
-                                     surface_Color.rgb,
-                                     Normal,
-                                     surface_Site,
-                                     Surface_to_Camera);
-    }
-    
-    vec3  Gamma = vec3 (1.0 / 2.2);
-    final_Color = vec4 (pow (linear_Color,     // Final color (after gamma correction).
-                             Gamma),
-                        surface_Color.a);
-}
\ No newline at end of file
diff --git a/3-mid/opengl/assets/shader/lit_textured_x2.vert b/3-mid/opengl/assets/shader/lit_textured_x2.vert
deleted file mode 100644
index 50be162..0000000
--- a/3-mid/opengl/assets/shader/lit_textured_x2.vert
+++ /dev/null
@@ -1,29 +0,0 @@
-#version 140
-
-uniform mat4   mvp_Transform;
-uniform vec3   Scale;
-
-in vec3        Site;
-in vec3        Normal;
-in vec2        Coords;
-in float       Shine;
-
-out vec3       frag_Site;
-out vec3       frag_Normal;
-out vec2       frag_Coords;
-out float      frag_Shine;
-
-
-void main()
-{
-    // Pass some variables to the fragment shader.
-    //
-    frag_Site   = Site;
-    frag_Normal = Normal;
-    frag_Coords = Coords;
-    frag_Shine  = Shine;
-    
-    // Apply all matrix transformations to 'Site'.
-    //
-    gl_Position = mvp_Transform * vec4 (Site * Scale, 1);
-}
\ No newline at end of file
diff --git a/3-mid/opengl/assets/shader/texturing.frag b/3-mid/opengl/assets/shader/texturing.frag
deleted file mode 100644
index a527409..0000000
--- a/3-mid/opengl/assets/shader/texturing.frag
+++ /dev/null
@@ -1,27 +0,0 @@
-uniform int         texture_Count;
-uniform sampler2D   Textures [32];
-uniform float       Fade     [32];
-
-vec4
-apply_Texturing (vec2   Coords)
-{
-    vec4   Color = vec4 (0);
-
-    for (int i = 0;   i < texture_Count;   ++i)
-    {
-        Color.rgb +=   texture (Textures [i], Coords).rgb
-                     * texture (Textures [i], Coords).a
-                     * (1.0 - Fade [i]);
-                                      
-//        Color.a    += texture (Textures [i],  Coords).a * (1.0 - Fade[1]);
-
-        Color.a    = max (Color.a,
-                          texture (Textures [i],Coords).a * (1.0 - Fade[i]));
-
-
-//        Color.a    = max (Color.a,
-//                            texture (Textures [i],Coords).a);
-    }
-    
-    return Color;
-}
\ No newline at end of file