use of custom file format

contemporary-bathroom/contemporary-bathroom-pbrt_mur_carreaux/contemporary-mur-carreaux.pbrt

@@ -3,7 +3,7 @@ Film "image"
 #    "integer xresolution" 400 "integer yresolution" 400
 #    "integer xresolution" 500 "integer yresolution" 500
     "integer xresolution" 800 "integer yresolution" 800
-    "string filename" "contemporary-bathroom-mur-carreaux.png"
+    "string filename" "contemporary-bathroom-mur-carreaux.rawls"
     "float scale" 3
 "float maxsampleluminance" 50
 

contemporary-bathroom/contemporary-bathroom-pbrt_mur_carreaux_sol_gris/contemporary-mur-carreaux-sol-gris.pbrt

@@ -3,7 +3,7 @@ Film "image"
 #    "integer xresolution" 400 "integer yresolution" 400
 #    "integer xresolution" 500 "integer yresolution" 500
     "integer xresolution" 800 "integer yresolution" 800
-    "string filename" "contemporary-bathroom-mur-carreaux-sol-gris.png"
+    "string filename" "contemporary-bathroom-mur-carreaux-sol-gris.rawls"
     "float scale" 3
 "float maxsampleluminance" 50
 

contemporary-bathroom/contemporary-bathroom-pbrt_mur_gris_sol_gris/contemporary-mur-gris-sol-gris.pbrt

@@ -3,7 +3,7 @@ Film "image"
 #    "integer xresolution" 400 "integer yresolution" 400
 #    "integer xresolution" 500 "integer yresolution" 500
     "integer xresolution" 800 "integer yresolution" 800
-    "string filename" "contemporary-bathroom-mur-gris-sol-gris.png"
+    "string filename" "contemporary-bathroom-mur-gris-sol-gris.rawls"
     "float scale" 3
 "float maxsampleluminance" 50