You just need to extrude one to the correct height (with the PushPull tool ) then keep double clicking (still with the PushPull tool) on each face and they will repeat the same height.

You should work full-size in Sketchup.
It doesn't "draw to scale".
Set you empty SKP model - Model Info > Units - to say 'meters'.
Import the site-plan image and place it down flat.
Use the Tapemeasure tool and pick two points on this image that you know to be a given distance a part - perhaps a road width or a building-frontage width - let's say it's 30m. The VCB will show a dimension [it won't be 30m unless you are the luckiest guy in the world! but that's not important], immediately type in the correct dimension as 30m and press <enter>, a dialog asks if you want to rescale the model, say 'yes'. Group it and lock the group so you don't accidentally change it. The image is now scaled to the right size, so drawing things over it at their true size will be in the correct relationships/proportions.
Now you can draw over it to add new roads and block-building forms, entering the sizes in meters as you want... Group or make components of these parts so they don't 'stick-together' when moving/rotating...
You can set some scene tabs of 3d perpsectives or 2d plan [no-perspective] etc with shadows on as desired.
Export these as images - you can scale a plan later - once your model is more complete...
🤓

OK then, thanks. I don´t use it either.

Hi maximas,

I think Thom's UV Toolit this will work:

http://forums.sketchucation.com/viewtopic.php?f=180&t=18992#p15575

...or you could just texture the face with a semi-transparent png...

It appears to me that you are looking for Daysim

to stay with free tools, there's Radiance and Su2Rad (http://code.google.com/p/su2rad/)

If I recall well someone was writting another code that could be used instead of Radiance (faster and easier to use). Does someone have information on it?

@tig said:

Here's an example made by drawing sub-divisions over larger faces and using 'windowizer' on them...[attachment=0:16aey7ds]<!-- ia0 -->Capture.PNG<!-- ia0 -->[/attachment:16aey7ds]

thanks Tig for replyyy please i would like an tuortial wih triangle one pleaseee!!
step by step and how divide this ? they are an script to divide or just put line on faces???

👍
this what i would like to create!! exactlyy

http://www.presseocean.fr/galerie/21/PHOTO_109183_px_458__w_presseocean_.jpg