The way I generate the tiled images is by combining the layers in Palmer, then "Write modpath textures". It's not something you get straight out of Blender.
I think that KnifeTheSky77 meant about removing the constraints from how backgrounds are currently tiled, and have full control over what layers can be displayed and where. My current work on finalizing my fields has shown how much limiting that can be.
I know you can do it in Palmer but you need an XML file that has the texture coordinates so it can "untile" it and display it properly.
The XML looks like this and I was wondering if you could auto generate it
<background2d image="maps/ffvii/field/startmap.png" position="0.0115064 -0.301172 10.3248" orientation="0.999969 0.00701926 0.000122074 0.00256355" fov="30.7098" range="-3072 -3072 3072 3072" clip="960 720">
<tile destination="-480 -384" width="48" height="48" uv="0 0 0.0625 0.0625" depth="999" blending="alpha" />
<tile destination="-432 -384" width="48" height="48" uv="0.0625 0 0.125 0.0625" depth="999" blending="alpha" />
<tile destination="-384 -384" width="48" height="48" uv="0 0.0625 0.0625 0.125" depth="999" blending="alpha" />
<tile destination="-336 -384" width="48" height="48" uv="0.0625 0.0625 0.125 0.125" depth="999" blending="alpha" />
<tile destination="-288 -384" width="48" height="48" uv="0.125 0 0.1875 0.0625" depth="999" blending="alpha" />
<tile destination="-240 -384" width="48" height="48" uv="0.1875 0 0.25 0.0625" depth="999" blending="alpha" />
<tile destination="-192 -384" width="48" height="48" uv="0.125 0.0625 0.1875 0.125" depth="999" blending="alpha" />
<tile destination="-144 -384" width="48" height="48" uv="0.1875 0.0625 0.25 0.125" depth="999" blending="alpha" />
<tile destination="-96 -384" width="48" height="48" uv="0.25 0 0.3125 0.0625" depth="999" blending="alpha" />
<tile destination="-48 -384" width="48" height="48" uv="0.3125 0 0.375 0.0625" depth="999" blending="alpha" />
<tile destination="0 -384" width="48" height="48" uv="0.25 0.0625 0.3125 0.125" depth="999" blending="alpha" />
<tile destination="48 -384" width="48" height="48" uv="0.3125 0.0625 0.375 0.125" depth="999" blending="alpha" />
<tile destination="96 -384" width="48" height="48" uv="0.375 0 0.4375 0.0625" depth="999" blending="alpha" />