For those who might be interested: NASA has released a set of "color and elevation maps [that] are designed for use in 3D rendering software". The material has been assembled from Lunar Reconnaissance Orbiter images and laser altimeter data.
The Moon CGI kit is here:
https://svs.gsfc.nasa.gov/4720 (and the blog post about their assembly of this data is here:
http://lroc.sese.asu.edu/posts/707)
The color map comes as .TIF files in a variety of sizes up to 27360x13680px; the displacement map / height map at 64, 16 and 4 pixels/degree, the biggest of these coming in at 23040x11520px. (My rendering machine is whimpering softly at the thought of being asked to handle a file that big, but I bet it won't bother a lot of you.)
Best -- D.
