Um, make a program that will cut up the image in 64x64 tiles. Then save them out each with there own name. Take two tiles where the edges line up exactly where the blood is in different positions and open them in photoshop, drag one over the other as a layer use the eraser to erase the visible blood on the top and have the clean area below show through save it as something like final.
load image "blood.bmp",100
paste image 100,0,0
make directory "export"
set dir "export"
name$ = "export"
number = 1
format$ = ".bmp"
R = 64
B = 64
for x = 1 to 64
get image x,L,T,R,B
inc R,64
inc L,64
if R = 576
L = 0
R = 64
inc T,64
inc B,64
endif
next x
for a = 1 to 64
save image name$ + str$(number) + format$,a
inc number,1
next a
a = 517
b = 0
for x = 1 to 64
paste image x,a,b
inc a,64
if a = 1029
a = 517
inc b,64
endif
next x
wait key
do a new program to take your fresh clean tile and rebuild you a new final 512 x 512 image and export it.
create bitmap 1,512,512
set current bitmap 1
load image "final.bmp",100
name$ = "blood"
format$ = ".bmp"
b = 0
for x = 1 to 64
paste image 100,a,b
inc a,64
if a = 512
a = 0
inc b,64
endif
next x
get image 99,0,0,512,512,1
save image name$ + format$,99
exit
then you will have something that looks like this took about 5 mins as for just pulling the blood off and leaving the cracks thats impossible since it .jpg and no layers you could add them in yourself though.
Edit: Exactly what indy said to do.
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