If indeed we are going to have brush based sculpting tools then they should be aware. That is to say that they must respect the procedural or fractal method (In the case of height fields) that the terrain to be sculpted was generated with in the first place. Brush based sculpting tools have always had the fundamental flaw of producing overly smooth terrain that looks nothing like the original terrain.
Any one who has ever used a brush based sculpting system weather that be in Terragen 0.9.43, Bryce or any where else will tell you that the sculpting brushes never respect the terrain that is been sculpted, there is a great opportunity for TG2 to change this.
The sculpting tools must be live and have a definable area of influence as well as presets, the ability to change the angle and brush tip size (Think Photoshop) would be a grate asset. This live sculpting brush would work in the 3D Preview and would work at both the Macro and Micro Level of Detail.
The human mind perceives a great amount of detail around us, this detail maybe small and much is filtered out by the brain to prevent information overload; however when absent this detail is missed thus the mind has problems perceiving the viewed image as real this is the quandary of CGI generated terrain.
If the plain is to use the Deep Edition of TG2 in motion pictures then the micro detail is of concern if any TG2 elements are going to be anywhere close to the camera position in any given shot.
Regards to you.
Cyber-Angel
