This is an abstract from the « Towards a Standardization of Photogrammetric Methods in Archaeology: A Conversation about ‘Best Practices’ in An Emerging Methodology » session, at the 84th annual meeting of the Society for American Archaeology. 3D photogrammetry, creating digital 3D models using multiple photographs, has become a popular tool for documenting, analyzing and sharing archaeological artifacts and sites. In some cases, though, Reflectance Transformation Imaging (RTI) can be a useful complementary documentation/analysis technique, perhaps even superior for some artifacts and uses. RTI generates digital virtual lighting models of surfaces using multiple photographs taken at different lighting angles, which can be thought of as « 2-1/2D » information. Examples of optimal use cases for each technique will be discussed and compared.