A simple Google asubha pictures can help.
And there's something i have found that can help :
For practitioners only
This book is intended only for serious practitioners who wish
to overcome greed and hatred.
In the forest tradition of Lungphu Mun and Luangta Maha Bua
the practice of asubha or seeing the loathsomeness of the
body is one of the key practices to overcome sexual craving
and greed and hatred...
In order to practice asubha, as taught by the Lord Buddha, by
watching corpses decay (we can't do that nowadays) and
contemplating the loathsomeness of the body we need some
incentives. Here in the tradition of Luangta Maha Bua pictures
of rotten corpses, body parts and people in various accidents
with torn-off limbs or swollen up bodies are used to get
experience in body contemplation. Once we are able to
internalize these images and see them more or less clearly
with our inner eyes, then we can compare these pictures with
the nature of our own body and investigate further until we
finally understand the true nature of the body.
Feeling the repulsiveness or loathsomeness of these pictures;
getting angry, wanting to throw up or falling unconscious are
all an integral part of these exercises. One can consider this as
a warm up exercise; for once we really see the nature of our
own body it will hit us hard.
Because within this exercise we have to deal with strong
unpleasant feelings, this book then is really only for the
practitioner, who has some experience in practice and has
learned to deal with these kinds of emotions in a wholesome
If you have read it and you are ready http://www.luangta.eu/site/books/book15_asubha.php