I need to make straight lines, such as in this image.

http://newsimg.bbc.co.uk/media/images/44290000/jpg/_44290101_08_fields.jpg

I tried doing it by hand but my hand is too shakey, is there a straight line tool that I dont know about or is there another way to achieve perfectly straight lines?

I would suggest to draw the lines in a 2D graphics program like Photoshop and then import the image to add to your terrain via the "picture" function (or a texture map node in a procedural terrain).

Another alternative is to use a function (Noise Nodes -> Line patterns for example), but that way you have less control about how and where the lines appear.

Ciao
TD

Thanks TD! Ill give that a shot I never used the picture funtion, I will now, thanks.

I second thd777, that's what I would do.

and I third it.  Just remember black is lowest height and white is max height.  For straight height like sidewalks, roadways walls use black background and white lines in your 2d program.  Jan