CVAR r.HairStrands.Raytracing not working ?

Hello,

The console variable (CVAR) r.HairStrands.Raytracing seems to do nothing.
I know there is an attribute ‘Use hair raytracing geometry’ in the GroomAsset, but I would expect the CVAR to override that to be able to switch the usage for all groom assets instanced in the scene.

When I use this CVAR, I see no difference on the hairs in my scene whether it’s 1 or 0… Only when I manually change the GroomAsset’s attribute ‘Use hair raytracing geometry’ do I see a difference.

So, what’s the CVAR supposed to do ?
Is there a way to globally switch the usage of RT of groom ?
For example disabling it for viewport but activating it for an offline render through the movie render queue.

Thanks!