A texture map is a color chunk. They are used in textured materials. In most case the "vrtxUV" property is used as the indexing property. The texture data will be one of: txtrNm, imgFl, or imgDt.
nmdTxtr "checker" imgFl "checker.ppm" "ppm" end % a ppm file is stored in "foo.ppm" end nmdMtrl "matname" lmbrtn txtrMp "vrtxUV" txtrNm "checker" end end end end