The face.
    These pictures of the face were created by overlaying a Viking photo with a MGS one. Because the shadows face the opposite way in each one, the effect is somewhat like the sun rising, and the shadows fading. Ideally one should airbrush the shadows out of the MGS photo for the best effect, but this simulation is quite useful.
    One interesting point here is that it shows what most people consider to be the nose in the MGS photo is in fact the right cheek! The nose shape is created from other shadows.
    The MGS photo is also overlaid with the arrows pointing to the face mouth, which become more apparent as the MGS part of the photo overlay becomes more prominent. The photos are quite precisely overlaid to the point where objects all over the MGS photo match with the Viking one.
1.                                                           2.

Photo1 shows the original Viking face. Photo2 shows the  MGS photo overlaid over the Viking one. The MGS photo is 90% transparent.

3.                                                                        4.

Photo 3 is interesting in that 2 pupils begin to form (MGS 80% transparent). The left pupil is a hill, and the right pupil is a ridge over what was previously thought to be the nose. In photo 4 the eyeballs are more prominent and just under the right eyeball what looked like the nose on the MGS photo comes up as the right cheek (MGS 70% transparent. Since the 2 photos are perfectly aligned in other feaures such as craters, the coathanger, etc. this effect cannot be due to a different perspective.
5.                                                                        6.

In photo 5 the eyeballs become clearer, and the left eyeball is seen to have 2 lines coming off it (MGS 60% transparent). These lines are added in to illustrate geometric patterns and lines in hills around the face. In photo 6 the face effect starts to fade, but the left eyeball is at its most prominent (MGS 50% transparent). The right cheek appears more as the hill in the MGS photo.

In photo 7 the face effect dies away as the shadows recede (MGS 40% transparent). The triangles appear as arrows all pointing to the same place on the face mouth.

    The eyeballs have some interesting symbols on them.

    This is the left eyeball in the photo above and this     is a traced outline of the eyeball markings on it. Here  is another view of the eye from the raw photo. Note that raw photos are not rectified for an overhead view, and so appear from a different angle.

    This is the right eyeball in the photo above and this     is the outline of the eye shape. Here  is the eyeball from the raw photo.

contains a left  eyebrow symbol outlined here:  The left eye cavity is darker here .   The right eyebrow  contains eyebrow symbols outlined here: 

    Where the shadow creates a nose effect there are 2 nostril symbols:
    This is the left nostril and here     is the outline. Here  is the raw photo.
    This is the right nostril and here     is the outline. Here  is the raw photo.
    This is the nose tip ( raw photo  here)and this     is the outline with the nostrils. In this context the nose appears as flattened with simian nostrils. Here it is in the raw photo.

    This is the left corner of the lip outlined here:     The right lip edge  has the outline shown here:    The left mouth edge  has symbols here:

while the right mouth edge     contains the symbols 
This last photo is significant in that this is where the arrows all point to. It depicts a complex structure surrounded by possible language symbols.
    The lower lip  is outlined here: 

    The outlines on the face in the MGS photo is then: 
with the shadows forming the features more clearly in the overlays at the top of the page.