I am working on a scene with a Lighthouse in it. I created and textured it after partitioning different sections so that it would be easier to place the textures and then rejoined the mesh. Everything looked great yesterday but today the lighthouse has lost one texture. I can partition the mesh again and replace the mesh and then rejoin it but I don't understand what happened.
Can someone explain what might have caused this and how I can avoid it in the future?
The text I'm using refers to Blender 2.5. It says, "If you notice any strange effects when rendering, try entering Edit Mode, select all vertices and use the "Recalculate" Normals, or "Remove Doubles" options in the Tool Shelf. As a result of separating the mesh the Normals may have flipped, or you may have created a double mesh."
In Blender 2.72 I cannot find a way to Recalculate Normals or Remove Doubles.
