XP11 haze quantity & clouds color (solved)

EDIT - As luck would have it, I found the answer after posting..

There is a new art control to access the fog..

set("sim/private/controls/fog/fog_be_gone", 0.30)

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Original Post

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Am I right in thinking that you cannot use a .lua script to access sim/private datarefs in XP11 RC2 any more?

I have been using these small scripts to control shadows in the cockpit and ground haze but it does not appear to work any more.

Haze fix
set("sim/private/controls/fog/std_deviation_cutoff", 0.50)

Shadow fix
set("sim/private/controls/fbo/shadow_cam_size", 8192.0)
set("sim/private/controls/shadow/csm_split_exterior", 2.0)
set("sim/private/controls/shadow/last_3d_pass", 2.0)