'Render time' posts how long it took to render when it completes, 'render' doesn't. If you ever wondered how people can post render times to the second, that's it.

Here's a few links to my own explorations with IDL if it helps... most should still work with Poser 8 (I use PP2014).

http://www.renderosity.com/mod/forumpro/?thread_id=2885070

http://www.renderosity.com/mod/forumpro/?thread_id=2884825