I am on Poser 7 and am working to get more realistic renders. I heard this was important to do - but I can not see where to do it in the render options. Any advice? Thank you.

it is not important to do.

if you have blurry textures in poser 7 you should lower your "min shading rate" in your render settings.

In poser 6 this blur was commonly caused by texture filtering but they changed the way poser handles texture filtering and they moved the texture filtering into the individual material zone.

 the biggest problem is that they also set the default 'min shade rate" to 1.0 (perviously 0.2 i beleive) in poser 7. Many people didn't pay attention to this setting and assumed that texture filtering was the problem.

Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?message_id=2861782&ebot_calc_page#message_2861782

In the material room, Select the material zone on the figure that you want to change...at the bottom of an image node, there is an option for 'filtering' with the options of None, Fast or Quality.  Select 'None'.