How thick can the fog get?
If everyone including the killer used a murky reagent. How foggy would the trial be? It would be funny if you couldn't see your survivor in your third person camera 
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1 purple offering gives the maximum thickness already, which is, I believe, equivalent to 3 grey offerings.
All details are here :
https://deadbydaylight.gamepedia.com/Dark_Mist
Do Murky Reagents stack? Is fog with 2 Murky Reagents thicker than with 1 Murky Reagent?