Reflectance Transformation Imaging (RTI) Files
Reflectance Transformation Imaging (RTI) Files

Reflectance Transformation Imaging (RTI) is an imaging technique built around a process developed by research scientists at Hewlett Packard Labs. RTI allows the computational representation of surface shape and color from varying and user-controlled light positions. Each RTI file represents a composite of 48 images, taken from a fixed position, with a different light position in each. Using this information, RTI mathematically generates a model of the object's surface, and allows the user to "virtually" manipulate the position of light and shadow falling on the object.

More details about RTI can be found on the website of Cultural Heritage Imaging:


RTI files must be viewed in a separate application called RTIViewer. This application is free and open-source, and may be downloaded from the website of Cultural Heritage Imaging at this link (installers and documentation):

Using these files

In order to view the RTI files produced for an object, you must:
  1. Download the RTI file from the link on the object's landing page
  2. Download and install the RTIViewer application from the link given above
After opening the RTI file using RTIViewer, the user will be able to:
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