Specular support. Some edits to EditorTestWorld.xml aswell as some debugmodes for textures in the model component

include/Engine/Rendering/DrawFinalPass.h

@@ -41,6 +41,7 @@ private:
     Texture* m_WhiteTexture;
     Texture* m_BlackTexture;
     Texture* m_NeutralNormalTexture;
+    Texture* m_GreyTexture;
 
     FrameBuffer m_FinalPassFrameBuffer;
     GLuint m_BloomTexture;

include/Engine/Rendering/ModelJob.h

@@ -22,10 +22,26 @@ struct ModelJob : RenderJob
     {
         Model = model;
         TextureID = (matGroup.Texture) ? matGroup.Texture->ResourceID : 0;
-        DiffuseTexture = matGroup.Texture.get();
-        NormalTexture = matGroup.NormalMap.get();
-        SpecularTexture = matGroup.SpecularMap.get();
-        IncandescenceTexture = matGroup.IncandescenceMap.get();
+        if (modelComponent["DiffuseTexture"]) {
+            DiffuseTexture = matGroup.Texture.get();
+        } else {
+            DiffuseTexture = nullptr;
+        }
+        if (modelComponent["NormalMap"]) {
+            NormalTexture = matGroup.NormalMap.get();
+        } else {
+            NormalTexture = nullptr;
+        }
+        if (modelComponent["SpecularMap"]) {
+            SpecularTexture = matGroup.SpecularMap.get();
+        } else {
+            SpecularTexture = nullptr;
+        }
+        if (modelComponent["GlowMap"]) {
+            IncandescenceTexture = matGroup.IncandescenceMap.get();
+        } else {
+            IncandescenceTexture = nullptr;
+        }
         DiffuseColor = matGroup.DiffuseColor;
         SpecularColor = matGroup.SpecularColor;
         IncandescenceColor = matGroup.IncandescenceColor;