Classes:SkyViewpoint

Classes: Actor→SkyViewpoint
→SkyCamCompat
→StackPoint
→LowerStackLookOnly
→UpperStackLookOnly

Note: Wait! Stop! Before you copy this actor's definition into your mod, remember the following things:

You do not need to copy that actor, since it is already defined.
In fact, it's not just useless, it's actually harmful as it can cause problems.
If you want to modify it, or use a modified version, using inheritance is the way to go.
The actor definitions here are put on the wiki for reference purpose only. Learn from them, don't copy them.
There is only one exception: if what you want is changing Ammo capacity, you need to create a new type from Ammo.

The sky viewpoint is used to make skyboxes, it acts as the camera into the skybox. If, when the map is initialized, its TID is zero, it will replace the sky everywhere in the map. If its TID is not zero at that time, then corresponding SkyPickers with the same TID must be placed in the sectors where the sky is to be replaced by the one in the skybox. If the TID changes after map initialization, the skies are not affected.

The sky viewpoint takes one argument: visibility. The visibility for a skybox is equal to one-fourth the value of the first argument, so if you give it a value of 32 the visibility in the skybox will be 8.

DECORATE definition

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

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Skybox camera
Actor type	Map spot	Game
DoomEd Number	9080	Class Name	SkyViewpoint