Very nice , I particularly like the water colors!

Thank you thomthom, this solved my problem.

I don't know what happened, a few days ago everything was fine, but this mornig I opened Sketchup and I got this message"
"Error Loading File tt_selection_toys.rb
no such file to load -- TT_Lib/ui_manager.rb"
I have the latest updates for TT_LIB2 and TT_SELECTION_TOYS .I can't see a file called ui_manager.rb anywhere.
Has anyone an idea about what's going on?

Very useful, but it seems that it can't handle IES lights, or it's just me?

This layer manager is wonderful,it makes life so much easier, at least for those used to the layer manager in Autocad!Thank you!

Thanks, I very much needed this, life is going to be easier now...

Thank you all for your advice. I think the solution with a second dwg file is the best for me, it gives me also the opportunity to get rid of all kind of unwanted objects.

The problem is that I import the base for my models from Autocad and they are usually based on surveys, so that the origin point (0,0,0) might be very far.When importing to SU, I must keep the point of origin if I am to add elements from Autocad as the building develops.I guess there is no reasonable solution to the problem so far.Thank you anyway.

I don't know why, but when zooming in on a certain part of the model,the closest part disappears.
It happens in models big and small, with or without hidden elements, no matter what kind of view (parallel or perspective)
I'm using Su 7.1 Pro on windows XP.
Can someone explain to me what I'm doing wrong? Or may be it's a bug in the prog?

But not for me! I've tried all possibilities and the Extrude Edges by Face doesn't work! Is there some other plugin that interferes ?