--- /dev/null
+#!/bin/sh
+
+output="$1"
+tmpfile="$1.tmp.png"
+shift
+povray -D +A +UA -O- +FN $* 2>/dev/null > "$tmpfile" || sh -c "rm '$tmpfile'; false"
+pngcrush -rem gAMA -rem cHRM -rem iCCP -rem sRGB "$tmpfile" "$output" || sh -c "rm '$tmpfile'; false"
+rm "$tmpfile"