Blender Entities

[Andari]

Dear all!

I started to create my own custom story. I tried to create a custom entity with Blender (3D modeling tool), export ".dae" mesh and import it in the ModelEditor. The texture (externally edited texture (in Blender)) on the model did not appear in the ModelEditor – had to add a ".mat" (not a big deal).
First: How to Find out, where the used parts on the ".mat" are For a custom mesh? (I mean something like UV mapping.)
Second: Why is it that (I created the bed-nice without baladahine with Blender (actually I deleted some planes) and the ModelEditor, using the original texture) what I import in the Editor looks like I expect there, but clicking the gear icon (bottom) or adding it in a ".map" – nothing will be shown?
(In the case my English is bit uncorrect, as excuse: It is not my mother-langauge.)