In general: if you kill a monster with a body part that has some known (or suspected) property, is there any mechanic around harvesting the body part and using it as-is (or with minimal processing required)?

Specifically: We're fairly low level and just found ourselves fighting a Dretch. While none of us did very well on our knowledge checks, it became apparent during the fight that it had a fair number of buffs, including DR and elemental resistances.


Which of these are properties of the skin, and which are properties of the creature itself?
Would such properties persist in the skin after removal (and tanning, I assume)?
Would tanning/crafting produce armor, a wondrous item, a trophy, or what?


I read some comments about how his is sort of frowned upon since it disrupts the economics of the game... and, ultimately, I understand this is totally subject to DM's approval, but... just thought knowing how this is handled generally is appreciated.

(I asked another question about repurposing magic items which is somewhat similar to this, but I don't think this is a duplicate, since this is specifically about harvesting nearly-ready-to-use parts of creatures, whereas the other one dealt mainly with using magic items to create new items).


Question: IMovie06' Not working anymore because of Yosemite
Answer: Why not reinstall Mavericks and restore your backup from before the upgrade so you can finish your urgent work? You might even just get an external USB drive and just install Mavericks (or the original OS that came with your Mac) and boot from that OS to finish your projects.

You could then choose which OS to boot by holding the option key down at startup and just move the project files and media you need to the older OS.

Long term, an upgrade to a newer iMovie might be best, but not at the expense of learning new tools for projects that you know don't need the new features or learning curve.