How to ease the edges of a volumetric texture? I have a volumetric texture, and I don't know how I can ease the edges of this texture, to rub the &quot;cube shape&quot; of the volumetric texture.
I also need this to be keyframed.

I tried to use different combinations of gradient texture nodes, transparency node too, but I was not able to rub the edges.
Can you help me ?
Here's the node setup:

Here's a blend file : 
Bye guys ! :)
Using another Shape is indeed not a bad idea. (@Jachym Michal)
But here is a node setup to give you pretty good controll of the density border.
For better visibility I haven't multiplied it with your current density setup yet, but the math node already is sitting in place as you can see.