I'm not even sure where to start. There's HKS for detecting 1-handing/2-handing states, but I have no experience with HKS. And Cleverraptor did something to hide the blades of the weapon models they used for their Lightblades mod, but I don't know how they did it (didn't even use HKS for that). The steps I can think of are:
- Use HKS to detect if weapon is being held in one hand
- If one-handed, apply speffect with attached vfx
- Vfx links to fxr that hides the blade portion of the weapon only