@jesshyland @james So I was thinking 
if we can’t get a tinted block window without messing with a mesh. how about taking a water source block and rewriting its mechanics to display transparency vertically aswell as horizontally. Make it so it does not flow. Then we could use it as windows without messing with mesh limit. You could name it portal glass/ or jelly windows
Then you can set whatever effect you want when a entity passes through it.
*drowning
*burning
*shock