If your eye sees just a plain white or grey sky, then nothing you can do will solve that in a photo.
If they're really flat there isn't much you can do other than use ND grads to balance the brightness.
If there is a little detail to them you can use tone mapping to bring out that detail and make them good and moody.
If your eye sees just a plain white or grey sky, then nothing you can do will solve that in a photo. Either wait until a different day where the sky has some detail, or use photoshop to chop in a decent sky from another day.
The only time ND grads will be of use, is when the detail is there, its just too bright for the camera to expose properly and also expose the foreground.
If the detail isnt there to start with, a ND grad wont add it.
mrhoddy said:Thanks for this - useful, for some reason im thinking that a filter will somehow deepen the shading between clouds etc and bring them out if you know what I mean
It will I'f they're there. Yours eyes have much greater dynamic range than a camera, so if you can't see it, the camera has no chance.
If you can see cloud in the sky, then a grad will be of some use. If its just plain white or grey, then a filter won't do anything other than make it darker white or grey!
Your moody skies example shots on your website are what I'm talking about - deep down!! especially the hay bale ones and then also the moody B&W shots - were some of these via nd grads or tone mapping or both etc?