Raytracing and Opacity : Why it's not working?

Hi guys,

Can someone explain me why Opacity mask in within Material isn’t working with Ray Tracing ? I am talking about any kind of Sheets/Cards and also Particles made with Sheets which have material with Opacity mask (example Fog,Smoke,etc.) ? Other software’s dont have any issue with picturing the alpha/opacity while ray-tracing is on… is there maybe a work around I am not aware of ?

Thank you !

Well that is not a positive information :smiley: