vr.HiddenAreaMask 1 not showing mask

Hi

In release notes there are ‘hidden area mesh’ improvements claimed.

But I’ve found only few notes about it on forum around 4.9 & Oculus branches. Nothing about how to activate one except one note, which is actually not true (for 4.10).

In command line I could find a hint typing “vr.”. There are few flags, one of is “vr.HiddenAreaMask”.

Setting it to “1” I was sure that it should show mesh mask in any VR mode.

I am working with my own version of SampleHMD plugin. And no mask does not appear as well as with original SampleHMD plugin.

Is this feature supported only with Oculus?

On Web on Oculus forums I see, that library must return mask mesh, so maybe there is some code must be added to plugin?

Thanks for any advice!