i used the png2atf.exe to atf file from png.
But there are some android mobile phone shows that there is a problem. Image loss is very serious.
png2atf.exe -c e -q 0 -n 0,0 -r -4 -i "in.png" -o "out.atf"
This looks like the picture above the maze texture(sorry i can't find the upload pictures).
the phone use android system and cpu model is MT6592.