Render Plugins and Material/Objects Library for Revit

[Marcellus Ludivus Servus]

So this might be stickied somewhere but I could not find it. Please forgive the repost if so. Does anyone have suggestions for materials library packs tailored for Revit that you can purchase? Revit's out of the box is OK but we are looking for more color options for the same materials. Also, any suggestions for purchasable Objects/Entourage/Doodads libraries to quickly fill a scene for a render on a week-long charrette timeline? Lastly, any one know of a good foliage plugin? Something like Vue or speed-tree for Max? Thanks for your Help :) -Stefan

[Marcellus Ludivus Servus]

It appears that there might not be any of the items I asked above, so I'll expand my question:

What does your office do for managing your rendering process in Revit? For materials, do you have a person in charge of organizing these and adding new ones? For populating scenes, did you have someone develop a library of common prop objects? Or does anyone use Revit for concept renders?