there was a time i could click on create and then right click on one of the 2d planes..and i'd get a choice of 2d plain planes or volumetric..ie.. like inside..top and bottom... 

now, i can't seemt o find it.. bryce 7 pro. any idea where it ran to? 

 trying to create a thin layer of fog..very light..where there are things inside the fog. 

cheers and thanks