...detail when zooming...<<<

another approach is to render at something comfortable for yourself viewing on the screen, such as 800x900 (see following examples) but at high "saturation" settings in Poser. 

For instance, set minimum shading rate to .21 and pixel samples to 18. This will result in a longer render time, but you will discover that you can zoom in with less loss of detail than with less aggressive settings.

This width, 800 pixels, is around 4 times less wide than your 3000. But even if you bump up the settings to the numbers I am giving here, it won't take as long as 3000-wide with more modest settings.

::::: Opera :::::