On Jan 7, 2011, at 10:12 AM, Tom Goddard wrote:

  The BILD format produces a VRML model in Chimera and VRML models are 
horribly inflexible.  For instance you cannot change the color of an 
object in a VRML model without destroying the model and building a new 
one.  Basically the VRML is immutable after it is created.

This is not 100% true anymore.  If your BILD object doesn't have any ".color" directives in it, then the resulting object will be shown using the model-level color attribute, which can be changed in all the normal ways you can change model-level colors.  It may be true that parts of the model created before the first ".color" directive will use the model-level color (I'd have to find/read code I didn't write to verify that -- ugh!).

--Eric

                        Eric Pettersen

                        UCSF Computer Graphics Lab

                        http://www.cgl.ucsf.edu