Globalator: New users to Bryce often getstuck with the idea that Bryce renders "look" a certain way because they haven't experimented much past the default settings. as others have said above, look through the galleries: you will see some amazing images. Some things to help: never rely only on the sun, experiment with placing positive and negative radial lights in key places throughout your scene, in general lower ambience, make sure to adjust haze for the scale of your scene.