It's funny how "sub-D" is now used interchangeably with "subdivision levels" even though they are very different things (with one kind of sounding like a nickname of the other) Sub-D : Subdivision levels :
It's just a term that's used to describe how many times a model has been subdivided when using sub-division modeling. Each one of these of these subdivided cubes is another sub-d level. http://en.wikipedia.org/wiki/File:Catmull-Clark_subdivision_of_a_cube.svg
I have no idea if this tutorial is any good or not but it's the first thing to pop up when I rolled my face over the keyboard with googles search page up. [ame="http://www.youtube.com/watch?v=nRrXBtjiLyU"]Sub-D Modelling in 3Ds Max : Part 1 - YouTube[/ame]
Sub-d is the name of the modeling technic. You model a low poly cage that will look fine once subdivided with a subdivision algorithm (catmull-clark). Your base model having fairly low vertex, it makes shapes easy to control. Ok now i see Pior image. yeah that's Maya subd surfaces. Kind of patch modeling in max, transition…
yep, even that I am noob his answer was sounding strange to me xd. So in short subd means how detailed your model is, or something with zbrush? So sub-d and subdivisional level are one the same thing? That can be done in any program or just in zbrush? And do I do it poly by poly or it is a bit automatic? Sorry I cannot…