I thought this was a D3D( issue. But not.
So using UMMU 3.0 in Orbiter 2010
Here is the guy in the base at the start of the scn.
notice the missing material
if I shift X put the suit on and then shift X again suit off.
now he is good.
UMmu_99C-John_Koenig:UMmu
STATUS Landed Moon
POS -9.3002817 51.6004233
HEADING 243.20
RCSMODE 0
AFCMODE 7
PRPLEVEL 0:1.000000
NAVFREQ 0 0
XPDR 140
O2Level 100.0000
O2MaxLevel 100.0000
CardiacBeat 66.0000
Age 27
HudColor 0
Chute 0
PressureDeath 0
MeshName ummu/UMmu99CX02X
crewweight 55.0000
ProjLights 0
END