Graphics Reference
In-Depth Information
In our case, we had at our disposal only two image maps, the sintel_skin_diff.png
color one and the sintel_skin_bmp.png gray-scale map, which we used straight for the
bump; we could have obtained the missing maps with the aid of an image editor (such as, for
example, GIMP), but for the sake of this exercise, to obtain the required missing images, we
used the nodes: so, starting from the EPIDERMIS layer, that is the color map, we obtained
via the Hue Saturation Value DERMIS node the blood-vessel layer that lies beneath the
epidermis, as shown in the following screenshot:
The normal color map and the blood-vessel version rendered separately
By the use of the two ColorRamp nodes and the two gray-scale versions for the specularity
component, one sharp specularity map and a softer one are shown in the following screenshot:
The two different glossy maps obtained from the same color map and rendered separately
 
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