Created by Amphos this tool allows you to decompile FX files.
This tool allows you to decompile FX files located within the ClientFx folder. Extremely necessary if you plan on creating your own custom particle effects as you can precisely see exactly how the vanilla ones work. And because Monolith left extremely little in the way of documentation for creating new ones. This tool was created by Amphos. His source code is located here.
To use it, open it with a command line and use
Usage: fx_decomp input_file [optional output_file]