[CsMain] Lightmap problem

[Stephane Vaxelaire]

I have what appears to be a lightmap problem.
I'm loading an entity with a pcmesh that is some kind of boxes.
There is a blender screenshot attached to understand.

I UV mapped the whole mesh and checked the normals that should be right (they
are displayed in the screenshot).

I built this mesh using boolean operations (difference between cubes in this
case)

Now when after exporting this with blender2crystal and loading the mesh in CS
I get only 2 faces that are textured on the outside "box" and none in the
interior of the rooms inside the big box.

I have some interesting messages when CS loads the model :
crystalspace.mesh.object.thing:
  Oversize lightmap (161x361 > 256x256) for polygon 'thingMesh.002/4'
  Oversize lightmap (161x361 > 256x256) for polygon 'thingMesh.002/5'
  Oversize lightmap (361x126 > 256x256) for polygon 'thingMesh.002/6'
  Oversize lightmap (361x126 > 256x256) for polygon 'thingMesh.002/8'
  Oversize lightmap (361x27 > 256x256) for polygon 'thingMesh.002/39'

You'll also find the blender2crystal thingmesh attached.
Any hint would be greatly appreciated.

Thanks

<<attachment: box.jpg>>

thingMesh.002
Description: Binary data