Texturing Functions


\begin{defkey}{blotch}{{\em BlendFactor surface}} Produces a mildly interesting ... ...s result in a great portion of the default surface characteristics. \end{defkey}


\begin{defkey}{bump}{{\em scale}} Apply a random bump map. The point of intersec... ... result is added to the normal vector at the point of intersection. \end{defkey}
Using an image texture applied to the ``bump'' component offers a more direct way to control the modification of surface normals (see below).


\begin{defkey}{checker}{$<${\em Surface}$>$} Applies a 3D checkerboard texture. ... ...an integral plane in texture space (e.g., {\tt translate 0 0 0.1}). \end{defkey}


\begin{defkey}{cloud}{{\em scale H $\lambda$\ octaves cthresh lthresh tscale}} ... ...- cthresh - (lthresh - cthresh)(1 - limb)}{tscale} \end{displaymath}\end{defkey}


\begin{defkey}{fbm}{{\em offset scale H $\lambda$\ octaves thresh} [{\em colorma... ...o scale the ambient and diffuse components of the object's surface. \end{defkey}


\begin{defkey}{fbmbump}{{\em offset scale H $\lambda$\ octaves}} Similar to the ... ... modifying the color of a surface, this texture acts as a bump map. \end{defkey}


\begin{defkey}{gloss}{{\em glossiness}} Gives reflective surfaces a glossy appea... ...ling should be used to render scenes that make use of this texture. \end{defkey}


\begin{defkey}{marble}{[{\em colormap}]} Gives a surface a marble-like appearanc... ...texture to control the density and orientation of the marble veins. \end{defkey}


\begin{defkey}{sky}{{\em scale H $\lambda$\ octaves cthresh ltresh}} Similar to... ...y opaque. Below {\em lthresh}, the surface is totally transparent. \end{defkey}


\begin{defkey}{stripe}{$<${\em Surface}$>$\ {\em size bump} $<$Mapping$>$} Appl... ... surface; if positive, it will appear to stand out of the surface. \end{defkey}
Mapping functions are described below.


\begin{defkey}{wood}{} Gives a surface a wood-like appearance. The feature size ... ...ry to scale the texture in order to achieve the desired appearance. \end{defkey}