[MAJOR] Almost all hidden properties are now disallowed, they have been allowed since UEFN released until 34.30.

We are reviewing these hidden rendering properties to decide whether or not they will be exposed for use.

Starting in v37.00, modifying these hidden properties from their default values will cause validation errors instead of warnings.

We urge creators to migrate off of these properties now, or let us know why that won’t be possible for your island.

bDisallowNanite
bRenderInMainPass
bRenderInDepthPass
bVisibleInReflectionCaptures
bVisibleInRealTimeSkyCaptures
bReceiveMobileCSMShadows
bCastDistanceFieldIndirectShadow
bSelfShadowOnly
ForcedLodModel 
bAllowCullDistanceVolume
bTreatAsBackgroundForOcclusion
bUseAsOccluder
BoundsScale 
CastRaytracedShado
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