Cristian, I'm glad to help when I can. You might try using the Environmental Lighting feature of Carrara. Insert a sphere and scale it so that it encloses your scene (say about 600inches size). Then map your Terragen scene to the color or glow channel. Back in the Assembly Room select Edit>Environment al Lighting. It's not a bad alternative to HDR. Of course you'll need a panorama from Terragen. It's not too difficult to write a script to do this, although if you want a perfect job you'll need to use some sort of panorama editing program to distort the polar areas. Regards, Mark