gzdoom/wadsrc/static/actors/shared/skies.txt

ACTOR SkyViewpoint 9080 native 
{
	+NOSECTOR
	+NOBLOCKMAP
	+NOGRAVITY
	+DONTSPLASH
}

ACTOR SkyPicker 9081 native 
{
	+NOSECTOR
	+NOBLOCKMAP
	+NOGRAVITY
	+DONTSPLASH
}


ACTOR StackPoint : SkyViewpoint native 
{
}

ACTOR UpperStackLookOnly : StackPoint 9077 native 
{
}

ACTOR LowerStackLookOnly : StackPoint 9078 native 
{
}


ACTOR SectorSilencer 9082 native 
{
	+NOBLOCKMAP
	+NOGRAVITY
	+DONTSPLASH
	RenderStyle None
}