I kept the walls but deleted all the unseen furniture and clutter :) Exactly for that reason. And it has helped a lot. The image is now, in less than 1 hour, further than it was earlier after 10 hours. That is with the other optimization tricks, too - the transmapped hair and such. 

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.