thanks for the nice comments so far, which I take as a kind of moral support. For sure, you can always improve things - illumination, material and so forth. I didn't take much about it in the current state. You won't see any shader effects for example. So in this state everything is about geometry, modelling and texturing. Nothing special at all.

I am desperately awaiting the 6.303 version, which will allow the use of *.fx files - this will be the moment to tune up the visual quality.