shader "top_name"  "top_mtl"  
(
 	 "num_cols"  1 ,
	 "illum" "model_16.p2a"
)
 
material "iii"  "swt_main_phen"  
(
	 "reflectivity"  0 ,
	 "sw_shader" TransparentFloor
)
 
end material