NAME
     TextureSpec - set texture of spectra
     TexturePeak - set texture of peaks
     TexturePrim - set texture of primitives

SYNOPSIS
     TextureSpec string expr expr expr
     TexturePeak string expr expr expr
     TexturePrim string expr expr expr

DESCRIPTION
     Set the texture mapping parameters of all selected
     spectra, peaks or primitives. The first parameter
     gives the name of a texture, the second paramter
     its scaling factor.

     The third parameter determines the amount of
     bumpiness of the surface. 0.0 results in a smooth
     surface, 1.0 in a very bumpy surface. The fourth
     paramter is a scaling factor for the bump pattern,
     a larger scaling factor will result in wider bumps.

     Texture mapping is not supported on screen, these
     parameters are used for preparing files for
     ray-tracing (PlotPov).

     The texture name must appear in the texture definition
     file of POV-Ray (textures.inc). If a texture is
     selected, the attributes of this texture will override
     the colors and material properties selected otherwise.
     If the name has the extension ".gif", it is assumed to
     be the name of a GIF file which is used as image map.

     Giving a value of 'as is' for the texture name or
     less than 0.0 for any numerical argument will not
     change it, this is useful for changing only part of
     the parameters.

EXAMPLES
     TextureSpec 'Blood_Marble' 0.5 0.0 1.0
     TexturePeak '' 1.0 0.5 1.0

SEE ALSO
     Select*, Color*, Material*, PlotPov

DATE
     960913
