I have an image and the ground plane is almost flat. Although I know I have a lot of distance between the front main obj and the background ones it doesn't show up because of my camera angle, which is almost on the eye level view and I want to focus on the front obj. Don't want to feed in haze because I want the colours saturated, also don't really want to use DOF because I want the background to be defined. Help! please.

Try "bleaching" the color on the background slightly, or use compositioning, and use a very small amount of gaussian blur.

Yup I agree with Rochr, you'll be surprised how a slight decrease in contrast & focus will help with out losing the background detail. It just seperates it from the FG.

you can use an object to set the scale as well..say something 'huge', scaled tiny, and close to the horizon..just a thought..

Another way, however trite, is to use something like a telephone pole(we all know the size of those) and make a row of them receding into the distance.

Thanks for all the suggestions........I love the help you get here. Will try them out and see what happens.

Perhaps some grain post-worked? In photos (stereotypically), as a scene gets farther away from the camera you can encounter grain, de-saturation of colors, blurring, etc. Without using haze or blurring, a bit of grain might help, otherwise what pakled stated, give the viewer something they can eyeball to suggest scale and/or distance. AS