Night time textures and lighting

I have recently restarted my recreation of the now even more extinct Devizes Branch line after a couple of years of being just too busy.

I was building my versions of signal boxes using google sketchup and GIMP (together with TGAtools, aceit etc) and ran into difficulties with night textures.

Whilst I can create the night textures I'm not that impressed with the way in which models just have dim, yellowish windows at night.

I have been playing around with light sources but have run into a problem which is how to get a light source to show through an opaque window.

Has anyone tried this?

Try this link

http://msts.steam4me.net/tutorials/night_light.html


Frank