Notice how the lower quality render shows the hair with a good transparency map while the high quality render shows it all solid.

Any ideas what's going on here? I now realize that I ran into this once before with this hair, so I don't think it's something unique to this scene. Is this a known problem? I should point out that I'm something of a newbie to prop hair since I usually use dynamic hair.

If it matters, I'm running P6, sp2.

I had similar problems with CC hair.
I'm a novice here so follow my advice only if you have a back up plan. ")

I almost didn't want to reply my advice here as it includes deleting stuff. So make sure the 1st thing you do is make back ups.

Do you still have the zip file for the hair?
Try deleting the actual runtime files, then decompress & reload it again. I believe I had to replace the hair in my scene so if you have edits to it you will lose them. Did you make those back ups yet. ;)

I can't explain why this is but at 1st I had to bring the trancparency in Materials down or up & back again for it to even show in preview correctly.
I thought I had it solved then when like two renders away from completing my last scene my hair went back to what you are getting in your pic.

I think it is a P6 thing. I'm thinking the hair was created for a previous version. I'm also a novice so maybe others can add something here.

I hope this works for you but more so I hope it doesn't put you further back. Again I am new at this to.

Good Luck!

Scott

Can you post a screenshot of your material room settings for the hair?

In this pic you see the node for the transmap. On the left is while I was having the problem. The file is listed correctly, but there's no image. I saved my scene, exited Poser, and reloaded. Then I got the one on the right. It now renders correctly.

Weird.

Weird, but not unexpected. Poser 6 tends to lose textures when it's out of memory. Restarting Poser fixes it.