Can't increase density on a small object This is a newbie question but I've searched all over and can't find a solution.

I'm following this tutorial to create procedural clouds and it works perfectly
https://www.youtube.com/watch?v=GhMQN4vVMIU

But I'd like to add these clouds to a small scene, which has been created using BlenderGIS and then scaled right down. I've scaled it down so that camera depth of field can give the scene a 'model village' type of look. At full size, depth of field has no effect because the scale is massive.

When I scale the clouds down, they become almost completely transparent, seemingly no matter how high I set density.

This image is a copy from the YouTube link showing the shader (the missing bits to the left are texture coordinate and random noise).



It's the principled volume step that causes the cloud to go almost completely transparent when small. Without that it works, but the cloud doesn't have a nice density effect.

Is there a way to make a cloud like this very small and maintain the density? I found references to 'Density Scale' in the user manual prior to 2.8 but not sure if that's what I want and I can't find references to it anywhere in 2.8.

Thanks!
Don't forget to bump up the sample count in Render > Volumetrics > Samples.
They're set pretty low by default.