Some of them are, you can look the function's source up in c:\program files\blitzmax\mod\sidesign.mod\minib3d.mod\inc\tglobal.bmx and functions.bmx in the same folder.
If a function contains only for example surf.addvertex(..), then sure you can use this method instead.
If a function contains only for example surf.addvertex(..), then sure you can use this method instead.