MFD is transparent in VR for some aircraft

[rocketeer]

Recently I was very happy to learn that now it is possible to show MFD in VR by adding these two lines to monitor setup lua.
VR_allow_MFD_out_of_HMD = true
VR_allow_MPD_out_of_HMD = true

https://imgur.com/bQxmrHi

Some instrument is transparent but the MFDs here have dark background in the F18 so if displayed on a second monitor it will be easy to read.

 

Then I tried on the F15E but the MFDs are transparent.
https://imgur.com/3HSiLhM

These MFD have dark background in F15E when not in VR.

 

Someone suggested this.

DCSWorldOpenBeta\Mods\aircraft\FA-18C\Cockpit\Scripts\Multipurpose_Display_Group\Common\indicator\BAKE\MPD_common_bake_page.lua
to have background black
HUD_only_back.material                  = MakeMaterial("",{0,0,0,255})

to have background transparent

HUD_only_back.material                  = MakeMaterial("",{0,0,0,0})

 

The F15E doesn't have the same path for BAKE folder.

D:\DCS World OpenBeta\Mods\aircraft\F-15E\Cockpit\Bake\MFDG
by default it is all 255
mfdg_base.material            = MakeMaterial(nil,{255,255,255,255})

 

I tried 

tried
mfdg_base.material            = MakeMaterial(nil,{255,0,0,0})
mfdg_base.material            = MakeMaterial(nil,{0,0,0,255})

and various combinations in between.

 

I tried making background of MFD in Helios black.

https://imgur.com/0yNyocS

 

Nothing worked. All I can do is to increase brightness and contrast of the transparent MFDs to make them more visible.

If anyone knows how to make these MFDs with opaque background in the F15E like the ones in the hornet please let me know.