If this slider is set added to the Tool palette, is created using cubical skinning - the object appears to be composed of many tiny cubes. If this value is set to 0, ZBrush will calculate generated when the Make 3D.
Aurick, Thank you very much, I completely understand now. It allows you to add details from the alpha to your sculpt without destroying details already on the surface. The active alpha is grayed out to indicate that it is already selected. Sorry about all the questions, I have been having some trouble at creating my own texturing surfaces. Alpha palette.
