Earlier videos touched on the sculptural speed advantages of working from low voxel resolutions to higher voxel resolutions. This video discuses a different approach , Proxy Mode. A working mode that allows the user to drop down resolutions to enjoy the benefits of both lower resolution sculpting whilst maintaining higher resolution sculpting details simultaneously.
In the video simple creases are placed as detail at a higher resolution . Next the surfaces at the neighboring boundaries to the creases are modified in a lower resolution proxy mode. When switched back to the higher resolution stage - the creases maintain their integrity in relation to the newly created neighboring form changes and thus you're accessing the speed advantages of low rez sculpting mixed with the crisper detailing advantages of higher resolutions.
By habit I tend to prefer a low to high method as it encourages me to set up the character by degree whilst creasing/ detailing at higher resolutions but the proxy method can solve working issues as well as offering other benefits when modelling i.e working in reverse. Creases first , then modifying the surrounding planar changes at lower proxy resolutions - then switching back to the high resolution stage with the maintained occluded creases.
So proxy mode isn't just for modifying and maintaining any existing higher resolution surface textural details - it can also be used efficiently to quickly sketch in crease details and model in relation to these using the surface tools.
Even in the simple facial form viewed above , the boundary change at the eye socket's rim can be viewed as detail. 3D-Coat's Proxy Mode will attempt to maintain even these seemingly basic form changes and thus you can use this to your advantage to indicate the echos and nuances of bony landmarks and muscles in your sculpts.
NB: Only the surface mode tools function in proxy mode. Also note there is no undo once exited from proxy mode i.e you cannot return to the pre-proxy mode state . Therefore working on a copy maybe prudent.