Heya Susan
So all I did now was to check the default style and uncheck the profiles and bingo.
I still don´t understand "hidden line mode" thou. I am constantly switching between
the different views and my problem was in the "shaded with texture" too. (Not a total noob here 
)
Anyway it now is nowhere to be seen. Everything is nicely displayed. Hmmm.
Many many thanks for your help. Nice to have ppl who actually have time and knowledge
to help others.
Wolf
Okay. I won´t merge. I was busy setting up a ftp connection and my webspace to post the data anyway. 
Thanks for the help. It is highly appreciated.
Hya Sorgesu
Thanks for your help. But, post the model? You mean the .skp as an attachment inside
this post? Gotta try this.
About your tips...
So if I merge the layers, after I grouped the buildings, and then reasign the groups to
different new layers, there is a possibility of getting everything right?
And what´s "colour by layer", please?
I´ll try posting the model
Wolf
Hello there
Up until now I allways could help myself with the video tuts and previous forum entries.
But now I am totally stuck and close to having a conorary.
I have a model with a few buildings. Commercial factory. To be safe I drew everything on
a different layer, foolishly thinking they´d prolly work the same as in Photoshop. Now, I allready found out that evrything transparent is locked into Layer 0. But that doesn´t help me.
I have tents all over the place and the tents have windows and beeing able to see thru them is mandatory. In addition I need trees. And I have a floorplan I imported as a picture which I initially placed onto a layer I called background, or so I thought I did. Still a but fuzzy about how those layers work for real.
Now, every tree I got from the 3D warehouse is not visible as long as the transparencies are checked on. If I uncheck em, my windows become black. And adding insult to injury, now with transparencies checked on, my floorplan vanishes. But without it I can´t work. I am partial to just working with default component trees, but they´ll stick out of the finished pic because they´re pretty low poly by comparisson. And then when I´m done turning the transparency on again because then I´ll no longer need the floorplan.
But there gotta be a better way. Please, can anybody out there tell me how to display trees and windows at the same time? Where´s my big mistake???
Many thanks in advance
Wolf