ChromiteBlue.com

assuming the Eagle3D directory structure looks as follows:

[Eagle3d Root]
    |- doc
    |- examples
    |- povray
    \- ulp
        \- img

the file “[Eagle3d Root]/povray/user.inc” will contain, by default, nothing.
if the following lines are placed within it (note that the shown filenames are only examples):

#ifndef(__user_inc)
#declare __user_inc = true;

//#include "user_includefile01.inc"
//#include "user_includefile02.inc"

#end

adding new parts is a simple matter of adding the new file to the [Eagle3d Root]/povray/ directory, copying an #include directive, changing the name, and uncommenting it.

in my own installation, I follow the recomended prefix style of filenaming, as do the files available on this site.

additionally, if the current user.inc file is not empty, it can be renamed to “user_orig.inc” or similar, a new user.inc file containing the above added, and the line #include “user_orig.inc” placed within it.