I'm thinking of making some awesome particle effects for things like nukes. (not the explosion, the trail.) Is this possible?
How does one edit particles? Find the PFX file you want. These will be found in either the ammo file or the unit file. Some may reference a json file for an effect, in which case that json will reference the pfx file. Dump the contents of the pfx file into jsonlint to make it readable. Now use trial and error. Have fun.