fixed rendering resolution and added shape png

Makefile

@@ -5,13 +5,16 @@ STL=$(addprefix example/, $(notdir $(SCAD:.scad=.stl)))
 PNG=$(addprefix example/, $(notdir $(SCAD:.scad=.png)))
 
 example/%.stl: example/%.scad
-	openscad $< -o $@
+	openscad $< -D \$$fn=64 -o $@
 
 example/%.png: example/%.scad
-	openscad $< --autocenter --viewall --imgsize=640,480 -o $@
+	openscad $< --autocenter --viewall --imgsize=640,480 -D \$$fn=64 -o $@
 
-.PHONY: all example/Readme.md
-all: $(STL) $(PNG)
-
-example/Readme.md: $(PNG)
+example/README.md: $(PNG)
 	python3 example/gen_readme.py $(SCAD:.scad=) > example/README.md
+
+shape.png: dxf.scad tile.scad
+	openscad dxf.scad --autocenter --viewall --render --camera=0,0,10,0,0,0,10 -D \$$fn=64 -o $@
+
+.PHONY: all 
+all: $(STL) $(PNG) example/README.md shape.png

README.md

 
+# Tile
+
 Project of universal mount system based on single tile.
+
+!(Tile shape)[shape.png]

dxf.scad

+include<tile.scad>
+
+projection()
+tile_raw_plate(T24, 1, 1, 1);

example/README.md

 # Gallery of tile examples
 ## example/tile_T24_5mm.scad
 ![example/tile_T24_5mm](example/tile_T24_5mm.png)
-## example/tile_T36_5mm.scad
-![example/tile_T36_5mm](example/tile_T36_5mm.png)
 ## example/tile_T24_5mm_centered.scad
 ![example/tile_T24_5mm_centered](example/tile_T24_5mm_centered.png)
 ## example/tile_sandwitch.scad
 ![example/tile_sandwitch](example/tile_sandwitch.png)
 ## example/tile_T24_2mm.scad
 ![example/tile_T24_2mm](example/tile_T24_2mm.png)
-## example/tile_H_T24_5mm.scad
-![example/tile_H_T24_5mm](example/tile_H_T24_5mm.png)
 ## example/tile_raw_plate_T24_2x3_2mm.scad
 ![example/tile_raw_plate_T24_2x3_2mm](example/tile_raw_plate_T24_2x3_2mm.png)
+## example/tile_T36_5mm.scad
+![example/tile_T36_5mm](example/tile_T36_5mm.png)
+## example/tile_H_T24_5mm.scad
+![example/tile_H_T24_5mm](example/tile_H_T24_5mm.png)