Sketchup to .stl


I digital publication has asked that I prepare all my graphics in .stl. When I do that, the .skp graphics lose their color and other elements such as lines and transparencies. Any advice on best practices for making graphics in .stl format?


From the Wikipedia:

See the bolded text.

Are you sure they want STL files?


This digital publication requested .stl, but will also accept other formats that allow the model to be visually manipulated on the browsers. An example would be at the end of this publication. Any suggestion on a different format for saving sketchup model that would allow a similar style of 3D model that could be manipulated on a browser?