hi lee, > > pdp_motion_phase > pdp_gradient > pdp_conv_sobel_edge > pdp_blur > pdp_cheby3o > pdp_save_png_sequence > pdp_diff > pdp_agc > pdp_contrast > pdp_saturation > pdp_motion_fade > pdp_pps > these are abstractions. add <pdp path>/abstractions to your pd path. tom