Oh boy, where to start?
First point is that this is nothing to do with what's in config.txt, it's a problem concerning the mesh file itself. The mesh files are in the same folder as config.txt or in a sub-folder within that. Mesh files have either a .pm or more often a .im file extension.
Texture files such as your grey.texture are made up of 2 parts;
- the actual image which is generally a .tga, .bmp or sometimes a .jpg file
- a text file, in this case it would be grey.texture.txt. You can open this file with Notepad and it should contain a couple of lines referring to the image file, such as "Primary=grey.tga" and Tile=st.
When you commit an asset via Content Manager into its database, those 2 parts are combined into one compressed file, in this case it would be called grey.texture.
A number of things could have gone wrong that will prompt the missing texture error message;
- the compressed file grey.texture really is missing or corrupted.
- the image file is missing, corrupt, or in the wrong format (eg. in 8-bit colour depth instead of 24-bit RGB).
- the texture.txt file is missing or refers to the wrong file name (this could be the result of a spelling mistake, or it might be pointing to grey.tga when the image is actually grey.bmp, or some other mismatch).
- it's also possible that the texture is not even required by the mesh, just that some stupid creator left a texture.txt file in the folder referring to an image that isn't there. You can check what textures a mesh actually uses by opening the .im or .pm file with PEV's Mesh Viewer and using the "Locate textures" function (just right-click anywhere in the Viewer window and a menu will pop up for that). In that case, just deleting the redundant texture.txt file will clear the error and will have no ill effect on the mesh.
Obviously what you do to correct the error will depend on what has gone wrong, but they are the main possibilities I can think of. Either way you have to end up with an image with the right name and format and a texture.txt file that contains the right corresponding info.
OK, sorry it wasn't exactly a step-by-step recipe but I hope it was educational!
Guys, did I forget anything?
~ Deane