To reveal the beauty of this object, we have unwrapped its decoration and used this image to create the line drawing of the engraved decoration. Based upon this engraving and upon detailed study of the applied embossing, we have created a displacement map of the decoration of each of the parts of the holmos.
The displacement map is created in the same way as for the other objects: we simulate the engraving and embossing process in different layers of a Photoshop image, that is overlaid on the unwrapped texture.
The displacement map is transformed into a normal map in Unity3D, giving a very nice real time rendering of the bronze object.
In this case, we derived the unwrapped texture from a 3D model that was made from dense stereo matching on a set of photographs taken with an object tent.
We first identified the full engraving of the lebes on the unwrapped texture, completing the missing parts. Then, we painted the embossed features in a similar way as the other objects, through observation of those features on the many photographs taken.
The displacement map was imported in Unity3D and translated into a normal map for real time visualisation (see images below, compare with images above). All digitally restored objects are integrated in the new version of the application.
This blog is part of the Etruscanning 3D project, that is being partially funded with support from the European Commission. This blog reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.