SetVisible will turn off physics, and there are few problems with it:
1) camera stop following character - no control for FX
2) character deals no damage (can be solved with statuses / timers etc.)
3) no equipment = not working multyattack skills, like flurry.
Was thinking about teleporting out of sight for skill cast duration, but again, no control of camera, it will follow and spoil animation + tons of scripting to remake half of the skills.
Tried adjust effects to be bright enough to cover that damn frame. But result was not that good.
Right now stoped at transforming character to smth else for the duration. Something VERY small.
Will have to tweak most animations to set animation Keys timing + create a characterTemplate with custom model scale, but it is still less work then all other variants I could imagine.
And if someone will share a secret how to get rid of that damn white frame - would be really gratefull =)