Is it possible to create a map for export with an obj from blender?

I mean of course it can export .obj plus the .mtl one, but I have discovered that most other 3D apps happily import the .obj but will not read the .mtl file and reference by a ,png etc map for color..

Poser for one is an app that I use that requires maps.

Sorry if this is the wrong place, was not sure to ask here or start a new thread..thanks :)