Cubik Studio

Hello !
I have some questions:
What is the "particle" part and what is it used for?
How can I put a worn sword by a command in a armor stand with the brat rocking at 270 °?
I would like to have creative ideas to do.

Thank you in advance

The "particle" texture is used for when a block breaks, or is run across. It doesn't really apply to item models.