TexGen (Material stage keyword)

From modwiki

Description

The texgen stage material keyword modifies the texture co-ordinates of the associated map as required by certain effects, such as skyboxes.

Usage

texGen [type]

Parameters

Use only one of the following in [type]:

• normal - ?
• skybox - Set the appropriate texture coordinates for a skybox. The associated stage should be a cameraCubeMap.
• wobblesky x y z - Same as "skybox", but rotate the coordinates according to the axis given
• reflect - Use the defined stage map for environment mapping.

Example

The following is a typical skybox map stage.

{
  blend add
  cameraCubeMap env/someskymap
  texgen skybox
}

Notes

Setting the "z" component of "wobblesky" to a positive value causes the skybox to rotate continuously around the vertical axis. This is used in Doom 3 in some of the Hell levels. See also the how to add a sky page.