Sets how PyMOL draws the surface. The default, surface_mode=0 does not include the heteroatoms within the surface; setting it to 1, does include them. See the example images.
surface_mode set to 0, the default. The galactose (blue) is not considered part of the surface.
surface_mode set to 1 -- now including heteroatoms. The galactose and all heteroatoms (blue) are now considered part of the surface and colored blue.
# make the above images, or something like them fetch 2v72 color wheat color marine, het zoom het and not resn HOH hide as surface, 2v72 # ray 800,600 # default set surface_mode, 0 # non default set surface_mode, 1
set surface_mode, int
where int is in the range of 0 to 4.
0 - default mode
1 - force inclusion of HET atoms