Here's the big secret to render settings. There is no special one size fits all rendering settings. Every render doesn't need to be done with the final render setting. When it comes to rendering in Poser, you'll want to use the correct settings that produce the look that you want. Sometimes I use a final setting and other times I use a draft setting. There's no instant art button when it comes to rendering, which is good because that gives us the opportunity to express our creativity. Having the correct render settings is all relative to the artistic look that you are trying to create.
The picture above is a common render setting that I use when setting up my scene. My decision to use this setting is solely based on the fact that it's the lowest setting required for showing shadows. These settings help me to correct any lighting problems, shadow problems, or material problems that may exist without me using a great deal of computer resources and time to render. This makes my entire work process faster.
Setting the slider to Draft will give you faster renders but it will lack the details that you need to see in order to determine if adjustments in lighting or materials need to be made. You can use this render setting for draft purposes. In general the slider should be placed on Final for photo realistic quality renders. Smooth Polygon and Depth of Field may also need to be selected depending on the type of model you are using and the scene that you have creating. Placing the slider anywhere between the custom draft setting and the Final setting will allow you to create high quality renders. You can choos between Auto settings and Manual Settings. As a beginner I would recommend that you first configure your settings using Auto Settings and then move to Manual Settings to transfer the Auto Settings to Manual and turn on the indirect lighting option if available. If you verson of Poser doesn't have Indirect lighting then stick with Auto settings.
As your skills improve you'll discover that you'll almost always configure your render settings using the Manual Settings option. Remember you want to take one step at a time while you are improving your skills. Trying to learn more than one thing at once will just make your frustrated and disappointed in your renders.