On my Pentax K20D, shooting in raw mode, I can still select certain scene preferences - e.g. "natural", "bright", "landscape", "portrait", and "Monochrome". Choosing one of these changes the way the image is shown in the in-camera display, but it also carries over to the Pentax raw conversion software, which also shows the raw image using this preference. I.e. choosing monochrome at time of shooting shows you the picture in black and white all the way through the workflow. Note however that the full colour information is still there, as within the pentax raw software I can choose any other scene mode after downloading and choose one of the colour modes instead.
The question is - I also get the benefit of this in a third party piece of free software I use for picture cataloguing - "My Photo Index". This understands DNG raw files but it also seems to honour the scene mode setting, so that pictures shot using the Monochrome scene mode are displayed in My Photo Index in monochrome.
Assuming that My Photo Index doesn't have any special built-in knowledge of the K20D, this presumably means there is something in the DNG raw file standard that allows such scene preferences to be stored in the file as meta-data. Anyone know about this and how it works? It's a very handy feature.