I’d be happy with a setting to enable it as a cvar for experimenting on.

Hi,

It’s unfortunately not as simple as that. The changes we’ve made are extensive and interwoven with many other important performance improvements, many of which affect DX11 and the wider engine too. As such the improvements cant be cvar’d or released without some element of risk to the main release. This is not acceptable to us as our next release is critical, and thus we’ll harden the changes internally and in a subsequent PTU/TechPreview channel.

Ali Brown