Difference between revisions of "Skybox"
From DoomWiki.org
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(Actually there is documentation for Dday's "sky models") |
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==Source ports with skyboxes== | ==Source ports with skyboxes== | ||
| − | * [[Doomsday]] — {{ | + | * [[Doomsday]] — {{dengwiki|Sky|Sky definitions}} New method of defining Sky Models as of 1.9 Beta6 |
| − | * [[Doomsday]] and derivatives — {{ | + | * [[Doomsday]] and derivatives — {{dengwiki|Map_Info|Map_Info definitions}} Pre 1.9 Beta6 method of defining Sky Models, though it is currently still supported. |
* [[Eternity Engine]] — see {{Eterwiki|Portal|portals}} | * [[Eternity Engine]] — see {{Eterwiki|Portal|portals}} | ||
* [[GLBoom+]] — using the {{Zdoomwiki|GLDEFS|GLDEFS|linkonly=1}} method from [[GZDoom]] | * [[GLBoom+]] — using the {{Zdoomwiki|GLDEFS|GLDEFS|linkonly=1}} method from [[GZDoom]] | ||
Revision as of 16:58, 16 August 2010
Skyboxes are different methods by which a fully 3D sky can be constructed (instead of the cylinder projection of the normal sky textures, or the dome projection commonly used in OpenGL ports).
Three types of skyboxes exist: texture-based and geometry-based.
A texture-based skybox uses cube mapping to project the sky texture on all six directions (east, west, north, south, up, down). The source images must be distorted in a way that compensates for the cube projection, or the skybox's boxy nature becomes too apparent. Programs such as Terragen are specialized in creating such source pictures.
A textured model. Very similar to the above except that the model doesn't have to be a cube and can instead be any shape or even multiple models.
A geometry-based skybox uses a special "camera" object placed in a part of the level (normally inaccessible to the player) which is used as the point of reference for projecting the sky. This method, basically a type of portal, is usually combined with normal sky or a texture-based skybox.
Source ports which have implemented skyboxes may provide either type of skyboxes, or both.
Source ports with skyboxes
- Doomsday — Sky definitions at the Doomsday wiki New method of defining Sky Models as of 1.9 Beta6
- Doomsday and derivatives — Map_Info definitions at the Doomsday wiki Pre 1.9 Beta6 method of defining Sky Models, though it is currently still supported.
- Eternity Engine — see portals at the Eternity Engine wiki
- GLBoom+ — using the GLDEFS method from GZDoom
- Vavoom — see SKYBOXES lump at the Vavoom wiki (archived)
- ZDoom and derivatives — see skybox at the ZDoom wiki
