Attached Link: http://www.daz3d.com/i/3d-models/-/clyde-puffer?item=4398&_m=d

Here's an example of a 4-year old file that does not have any PNGs. I redownloaded it from DAZ to see if it has been repackaged with them and it hasn't. It probably won't be because it opens fine in DAZ Studio. It doesn't look obsolete to me. It's still being sold--as are hundreds, if not thousands, of other Poser products at DAZ that have no PNGs. I'd imagine that there are many products in the Renderosity Marketplace that only provid RSR thumbs. It's a bit shortsited to say that Poser shouldn't be fully supporting products that are still being marketed.

Long after Poser moved to PNG thumbnails, content providers either only provided RSRs, as DAZ often did until a few years ago, or provided both. This ensured compatibility with Poser 4. By only providing the RSR format, file sizes were kept down and thumbnails were compatible with all versions of Poser until Poser 8. Including both RSR and PNG would add to file sizes which would add costs to the sites providing the downloads--as well as making it harder to download them when dial-up internet service was still fairly common. The RSR format lasted a lot longer than it should have because there were compelling reasons to keep using it. There is little reason for content providers to include RSR files today because Poser 4 is essentially obsolete now. With the vast amount of content that only has RSR files, it's too soon to not  the thumbnails visible inside the program without having to resort to workarounds.

The reason I asked this question is that a different poster wanted to know why Poser 8 wasn't showing thumbnails for some installed content.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon