from the tut:

Now return to the 'Pose' room and open your 'Render Settings' dialog. Below I have added two screen shots. One is of basic 'Draft' settings that are fast and useful for test renders. The other are the 'Final' render settings that I use. Copy the 'Draft' settings exactly into your Render Settings dialog. Make sure you are on the 'Manual Settings' page. At this time you may want to save these render settings for future use. You can do this by clicking the 'Save Preset' button and entering a name. You should do the same for the 'Final' settings when you are ready. Once you have the 'Draft' settings entered click the 'Render' button. The render will consist of two render passes. The IDL pass which is dark and contains red dots followed by the final rendering pass.

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854