Your question regarding surfaces reminded me of an inconsistancy I reported some time ago. Chime and Rasmol display a CPK or Spacefill (100%) image that closely resembles a Pauling (CPK) model. The "dots on" surface that I sometimes use to surround a stick model is the same as the CPK surface. In Jmol, however, the CPK or Spacefill display has hydrogen atoms more deeply imbedded in larger atom spheres. You can see this in a sample display of methane at: http://www.cem.msu.edu/~reusch/VirtualText/methanes.htm <http://www.cem.msu.edu/%7Ereusch/VirtualText/methanes.htm>
I do not have any expertise in this area, but I suspect that Jmol may be using true vanderWaals surfaces, whereas Chime and Rasmol are trying to duplicate the Pauling models. Since Pauling models are commonly used by chemists, I have taken to specifying Spacefill 65% to 70% in most of my models. Unfortunately, the dots surface cannot be adjusted in the same manner.
Bill


Miguel wrote:

I have a question regarding surfaces ...

Certainly there is a need for a Connolly surface ...

Q: Is there really any need to have a vanderWaals surface?

Q: What type of surface(s) does Chime support?


Miguel



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