I've been doing some modelling for Skylimit Tycoon, and thought that stairs with glass would be quite nice, so I setup a box as glass and painted it with a transparent color, but I found out that there are some problem with the transparency, as you see in the picture.
I made a less complicated testmodel and the results are the same.
I thought that it should be possible to use transparent colors within a model, or is this a known issue, or should I do anything special with the model?
Is it better to separate the glass into another model?
I have the test model as .blend, .obj, .j3o and diffuse png image: http://kecon.se/download/jme/transparency_box_01.zip
I usually export to .obj from Blender 2.76 and then convert in to a j3o without the material file and create materials dynamically in the game.