Inserting sky in GZDoom Builder

[MancubusBruiser1988]

How do I insert as sky texture? When ever I insert one it only comes out as a picture even when playing my map. Is there a certain setting I'm not doing? Have tried some advice from youtube vids and hasn't worked.

[BlueDoorDude]

Try using slade, create a texture from file then replace the default sky with a patch of it.

[scifista42]

In the Doom engine, sky is represented by a special flat called F_SKY1, which you must put on sector's ceiling (or possibly floor). As for which particular sky texture will be rendered in its place as a sky, depends on which map slot you're on, or whether you're using Boom sky transfers or ZDoom's MAPINFO to change the default textures for the given mapslots. See also http://doomwiki.org/wiki/Sky and http://zdoom.org/wiki/Sky.