(portals) |
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A texture-based skybox uses {{wp|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 {{wp|Terragen}} are specialized in creating such source pictures. |
A texture-based skybox uses {{wp|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 {{wp|Terragen}} are specialized in creating such source pictures. |
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| − | A |
+ | A skymodel. Very similar to a skybox 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. |
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. |
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* [[Doomsday]] — {{dengwiki|Sky|Sky definitions}}, a new method of defining sky models implemented in Doomsday 1.9 Beta6 |
* [[Doomsday]] — {{dengwiki|Sky|Sky definitions}}, a new method of defining sky models implemented in Doomsday 1.9 Beta6 |
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* [[Doomsday]] and derivatives — {{dengwiki|Map_Info|Map_Info definitions}}, pre Doomsday 1.9 Beta6 method of defining sky models, though it is currently still supported. |
* [[Doomsday]] and derivatives — {{dengwiki|Map_Info|Map_Info definitions}}, pre Doomsday 1.9 Beta6 method of defining sky models, though it is currently still supported. |
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| − | * [[Eternity Engine]] — see {{Eterwiki|Portal|portals}} |
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* [[GLBoom+]] — using the {{Zdoomwiki|GLDEFS|GLDEFS|linkonly=1}} method from [[GZDoom]] |
* [[GLBoom+]] — using the {{Zdoomwiki|GLDEFS|GLDEFS|linkonly=1}} method from [[GZDoom]] |
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* [[Vavoom]] — see {{Vvwiki|SKYBOXES|SKYBOXES lump}} |
* [[Vavoom]] — see {{Vvwiki|SKYBOXES|SKYBOXES lump}} |
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Revision as of 09:22, 8 February 2011
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: model-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 skymodel. Very similar to a skybox 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 one or more of the above types of skyboxes.
Source ports with skyboxes
- Doomsday — Sky definitions at the Doomsday wiki, a new method of defining sky models implemented in Doomsday 1.9 Beta6
- Doomsday and derivatives — Map_Info definitions at the Doomsday wiki, pre Doomsday 1.9 Beta6 method of defining sky models, though it is currently still supported.
- GLBoom+ — using the GLDEFS method from GZDoom
- Vavoom — see SKYBOXES lump at the Vavoom wiki
- ZDoom and derivatives — see skybox at the ZDoom wiki