Ok…actually this is not such a mystery, Nevertheless it had to be tested and here it is. A model that is covered by 3 different textures that uses stencilmaps in order to show the regions to be shown:
Ok..finally after some after work evenings I got the right workflow how to export stencilmaped textures from blender to jME! Actually that was one of the last main-features I wanted to learn until I can start building my first small level…. Here a picture of a wall: