Hi, when I export an animation as psd-sequence, there's an drop-down option "uncompressed" / "comppressed" (I have the german version, so I'm not sure if it's really called like this in english version). But, which compression is actually used?? When opened in Photoshop the pictures still have their alpha-channel and I didn't find any artifacts. But the file size shrinked to ca 20%. Does anybody know if this compression is really NOT lossy (like RLE and others) or ... whatever. Can use this kind of compression also with Photoshop (5.0)? I can't find any settings there. Because when I open and resave this small files the resulting filesize is much larger than before. Any tips? Thanks

Photoshop's compression is LZW, like zip, I'd guess, also like TIF, and I'm sure it is non-lossy. RLE (run length encoded) doesn't do very good on 24 bit color, often the files get bigger, LZW typically reduces 20 - 30% in file size, as you said. I think Photoshop started compressing the files in version 4, or it might have been 3. I know version 4 had a preference for saving files in 2.5 format, I'd guess 2.5 was uncompressed, 3.0 + compressed, but 4+ should have no problem reading either type of Poser save.

Thanks.