field MFString pc0   "local/shader/vp0.phl" ## shader
    field MFString pc1   "local/shader/outline.phl" ## shader
     field MFString pc2  "local/shader/quant.phl"  ## shader
    field MFString pc3   "local/shader/laplace.phl" ## shader
    field MFString pc4   "local/shader/edgedetect-color.phl"  ## shader
    field MFString pc5   "local/shader/cartoon.phl" ## shader
    field MFString pc6   "local/shader/hsv.phl" ## shader
    field MFString pc7   "local/shader/edgedetect.phl"  ## shader
    field MFString pc8   "local/shader/sepia.phl" ## shader
    field MFString pc9   "local/shader/gray-ofs.phl" ## shader
    field MFString pc10  "local/shader/gray.phl"  ## shader
    field MFString pc11  "local/shader/dizzy.phl" ## shader
    field MFString pc12  "local/shader/black-transparent.phl"