Merge pull request #64 from Csantucci/add-log-message

Adding log message and comment to pull request  #63
https://bugs.launchpad.net/or/+bug/1830498

Author: twpol

Source/RunActivity/Viewer3D/Materials.cs

@@ -72,11 +72,14 @@ public Texture2D Get(string path, Texture2D defaultTexture, bool required = fals
                             DDSLib.DDSFromFile(path, GraphicsDevice, true, out texture);
                         }
                         else
+                        // This solves the case where the global shapes have been overwritten and point to .dds textures
+                        // therefore avoiding that routes providing .ace textures show blank global shapes
                         {
                             var aceTexture = Path.ChangeExtension(path, ".ace");
                             if (File.Exists(aceTexture))
                             {
                                 texture = Orts.Formats.Msts.AceFile.Texture2DFromFile(GraphicsDevice, aceTexture);
+                                Trace.TraceWarning("Required texture {1} not existing; using existing texture {2}", path, aceTexture);
                             }
                             else texture = defaultTexture;
                         }