I`m not sure what went wrong to make your texture a solid color, but here are a few things that I think are required for certain textures to work:
The mesh must have been unwrapped. If it wasn`t unwrapped then in edit mode (in blender) you can press a to select the whole mesh then press u and then click one of the options that appears (maybe "Smart UV Project").
I think that the object can only be exported in object mode, in case you see the export button greyed out after doing this.
I didn`t change any of the export settings and it turned out ok.
I`m unsure if this is necessary, but I deleted all objects in the blender scene (including the lamp and camera) except the mesh before exporting the file.
Maybe ignore or even delete the scene file that was created by exporting, or just move it to the desktop in case it somehow interferes with the mesh.
I put the XML document that was created from exporting the object in blender, I put it on an application called OgreXMLConverter and got a MESH file out of it.
Then I put the mesh in the my_objects folder and copied (copied,
not cut) the rock MATERIAL file from the rocks folder into the my_objects folder.
Then I deleted everything in the new rock file but this
And then rename the rockTex.jpg to the name of your texture and rockMat to the name you`ll put into
the Material text box under the Mesh tab of FeralHeart`s object maker.
You can rename the new rock file itself to whatever ya want.
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Note: With the way I make meshes, when I load the mesh into the game is appears pure white. Then, in
the Material text box under the Mesh tab of FeralHeart`s object maker, I have to type in the name of the material (rockMat being an example).
I use Blender 2.59 when working with FH.