Yes Maru, Even I want to do the same, but it takes too much time to clean noise in refraction. ( 4 to 5 hours per frame for full HD)
Can you please give me any suggestion on it ?
If it’s glossy - increasing GIvsAA should help.
If it’s not glossy - lowering GIvsAA should help as more AA will be devoted to smooth the edges.
I do not know how it is made.